Public Health and Skin Color
- NOTOC**
Public Health and Skin Color
Skin color is a visible human characteristic produced largely by differences in the amount, type, and distribution of melanin in the skin. Human pigmentation evolved in response to environmental pressures, particularly ultraviolet radiation, but its importance to public health extends far beyond biology. Skin pigmentation can influence responses to ultraviolet radiation, vitamin D synthesis, the appearance of disease, the performance of some optical medical devices, and the recognition of clinical symptoms. At the same time, socially assigned meanings attached to skin color can influence discrimination, healthcare access, socioeconomic conditions, mental health, and exposure to harmful practices such as skin bleaching.
Modern public-health research increasingly distinguishes skin pigmentation itself from socially constructed racial and ethnic categories. People within the same racial or ethnic group can have widely different skin tones, while people assigned to different racial categories can have similar pigmentation. This distinction is particularly important when studying medical technologies, disease presentation, ultraviolet exposure, and other processes in which the physical properties of skin may directly affect measurement or clinical recognition.
Skin Pigmentation as Biology and Social Experience
Human skin pigmentation represents an interaction among genetics, geography, ultraviolet radiation, migration, diet, and cultural behavior. Darker pigmentation generally provides greater protection against ultraviolet radiation, while lighter pigmentation can permit more efficient cutaneous vitamin D production under conditions of relatively weak ultraviolet exposure.
These adaptations developed over long periods of human evolution. Modern migration, clothing, indoor lifestyles, dietary changes, and differences in sun exposure have altered the environments in which many pigmentation patterns originally evolved. Consequently, populations may experience environmental conditions very different from those that shaped their ancestors' pigmentation.
Skin color also has powerful social consequences. In many societies, skin tone influences how people are perceived and treated. Colorism—preferential or discriminatory treatment based on relative skin tone—can operate both within and between racial and ethnic groups. Research has associated color-based discrimination with differences in physical health, psychological distress, sleep, self-rated health, socioeconomic opportunity, and other aspects of well-being.
For public health, skin color therefore occupies two distinct but interacting domains: pigmentation is a biological characteristic with physiological consequences, while perceived skin color can also function as a social determinant of health.
Medical Diagnosis and Recognition of Disease
Many medical signs are traditionally described using color changes that may be easier to recognize on lightly pigmented skin. Redness, pallor, cyanosis, inflammation, bruising, jaundice, and some forms of tissue injury may appear differently or be less visually obvious in darker skin.
These differences can affect clinical assessment. Conditions such as eczema, psoriasis, lupus, rosacea, pressure injuries, and inflammatory disorders may present with different visible characteristics across the pigmentation spectrum. In darker skin, inflammation may appear purple, gray, brown, or otherwise less conventionally "red." Post-inflammatory hyperpigmentation may also be a prominent or persistent consequence of skin disease.
Pressure injuries illustrate the problem particularly well. Traditional descriptions often emphasize non-blanching redness, but this sign may be difficult to identify in deeply pigmented skin. Effective assessment may therefore require greater attention to temperature, texture, swelling, tenderness, firmness, and other non-color indicators.
Jaundice in newborns presents another challenge because visual recognition of yellow discoloration can be unreliable in darker skin. Researchers are investigating how pigmentation affects both visual examination and noninvasive bilirubin measurement.
Pulse Oximetry and Optical Medical Devices
Pulse oximeters estimate blood oxygen saturation by transmitting light through or reflecting light from tissue. Because melanin also absorbs light, researchers have investigated whether pigmentation affects the accuracy of these devices.
Multiple studies have reported that some pulse oximeters can overestimate arterial oxygen saturation in people with darker pigmentation, particularly when actual oxygen levels are low. This can contribute to "occult hypoxemia," in which a patient has clinically significant low blood oxygen despite apparently reassuring pulse-oximeter readings.
The issue became especially important during the COVID-19 pandemic, when pulse oximetry was widely used to guide treatment and hospitalization decisions. Subsequent research has emphasized the need for improved device testing, better calibration across the full range of human pigmentation, and objective measurement of skin tone rather than treating racial identity as a substitute for pigmentation.
Similar concerns apply to wearable devices that use photoplethysmography to estimate heart rate, oxygen saturation, and other physiological measurements. The growing use of smartwatches and medical wearables makes equitable performance across skin tones an increasingly important engineering and public-health objective.
Artificial Intelligence and Medical Imaging
Artificial intelligence is becoming increasingly important in dermatology, medical imaging, and diagnostic decision support. However, AI systems depend heavily on the data used to train them.
Dermatology image collections have historically contained disproportionate numbers of images from lighter-skinned patients. As a result, both clinicians and computer models may have less experience identifying diseases in darker skin.
Studies of dermatology AI have found performance differences across skin tones, and researchers have demonstrated that more diverse training data can reduce some disparities. Generative artificial-intelligence systems can reproduce similar biases when asked to create medical images, frequently producing lighter-skinned examples unless diversity is specifically incorporated into the system or prompting process.
Medical-imaging technologies such as thermal imaging and hyperspectral imaging may also encode information related to pigmentation. Developers therefore need to evaluate whether skin tone becomes an unintended source of bias in diagnostic algorithms.
Medical Education and Representation
A recurring theme in the research is inadequate representation of darker skin in medical education.
Dermatology textbooks, surgical textbooks, teaching collections, and clinical training materials have historically shown relatively few examples of diseases in deeply pigmented skin. This matters because clinicians often learn visual diagnosis by repeated exposure to representative images.
Studies of medical students and dermatology residents have found gaps in education involving skin of color. Training programs specifically designed to increase exposure to diverse skin tones generally improve diagnostic knowledge, confidence, and recognition.
Improving education requires more than adding a small number of photographs. Medical curricula need to explain how inflammation, infection, malignancy, vascular changes, autoimmune disorders, and other diseases may appear across the full pigmentation spectrum.
Dermatologic Disease and Health Disparities
Many dermatologic conditions affect people across all skin colors, but prevalence, severity, clinical presentation, treatment access, and quality-of-life consequences may differ among populations.
Atopic dermatitis can produce substantial disease burden in populations with darker skin, while conventional measures of erythema may underestimate its severity. Psoriasis may also appear differently, complicating diagnosis and severity assessment.
Acne can produce persistent post-inflammatory hyperpigmentation and scarring in darker skin, making control of inflammation especially important. Hidradenitis suppurativa has been reported to impose a disproportionately high burden on some Black populations and can be compounded by delayed diagnosis and limited specialist access.
Vitiligo can be particularly visible on highly pigmented skin because of the contrast between depigmented and surrounding areas. Research documents significant emotional and quality-of-life effects among patients with darker skin.
Rosacea has historically been considered uncommon in darker skin, but evidence suggests that it may often be overlooked because characteristic redness and visible blood vessels are harder to recognize.
Skin Cancer and Melanoma
Higher concentrations of melanin provide significant protection against ultraviolet radiation and are associated with lower overall rates of many ultraviolet-related skin cancers. However, lower incidence does not mean absence of risk.
Melanoma and other skin cancers occur in people with all skin tones. Research has documented disparities in melanoma diagnosis, stage at presentation, treatment, and survival among racial and ethnic populations.
Acral lentiginous melanoma is particularly important in discussions of skin cancer and skin color. This melanoma subtype occurs on areas such as the palms, soles, and beneath the nails and constitutes a larger proportion of melanoma cases among Black, Asian, and Hispanic populations than among White populations.
Later diagnosis, lower public awareness, access to dermatologists, socioeconomic factors, clinical education, and differences in tumor biology may all contribute to disparities in outcomes. Public-health messaging therefore needs to balance two facts: darker pigmentation substantially reduces the risk of many ultraviolet-related skin cancers, but people with darker skin can still develop serious and sometimes fatal malignancies.
Ultraviolet Radiation, Vitamin D, and Photoprotection
Melanin absorbs ultraviolet radiation and reduces ultraviolet penetration into the skin. This protection lowers susceptibility to sunburn and many forms of ultraviolet damage, but it also reduces the efficiency of ultraviolet-B-driven vitamin D synthesis.
Studies have repeatedly identified relationships among pigmentation, latitude, season, sun exposure, diet, supplementation, migration, and vitamin D status. Darker-skinned populations living at high latitudes may face greater risk of low vitamin D concentrations, particularly during seasons with limited ultraviolet-B radiation.
Public-health recommendations must therefore avoid simplistic assumptions. Skin color is only one factor influencing vitamin D status. Diet, body weight, age, clothing, time outdoors, latitude, supplementation, and individual biology can all be important.
Photoprotection guidance has also become more nuanced. Darker pigmentation provides considerable natural ultraviolet protection but does not eliminate ultraviolet damage. Sunscreen, protective clothing, shade, and other measures may still be useful, particularly for people with photosensitive disorders, pigmentary conditions, a history of skin cancer, or prolonged ultraviolet exposure.
Visible light can also contribute to pigmentation disorders in darker skin, making broad-spectrum approaches to photoprotection relevant to conditions such as melasma and post-inflammatory hyperpigmentation.
Skin Classification and Measurement
Research increasingly questions the widespread use of race or the Fitzpatrick skin-type system as simple substitutes for measured skin color.
The Fitzpatrick classification was originally designed primarily to characterize sunburn and tanning responses. It was not intended to serve as a universal racial classification or a precise measurement of constitutive pigmentation.
Objective approaches such as reflectance measurements, colorimetry, spectrophotometry, and standardized skin-tone scales may provide more useful information when pigmentation itself is the variable being investigated.
This distinction is especially important for studies of pulse oximetry, wearables, imaging technologies, ultraviolet responses, and artificial intelligence. Using broad racial categories can conceal considerable variation in pigmentation within populations and can incorrectly imply that race is a biological measurement.
Healthcare Access and Research Equity
Differences in health outcomes cannot be explained by pigmentation alone. Access to healthcare, insurance, income, geography, language, transportation, education, discrimination, and availability of specialists can strongly influence diagnosis and treatment.
Research has found racial and ethnic disparities in access to dermatologists, barriers to treatment for chronic inflammatory skin diseases, management of skin ulcers, and participation in clinical research.
People with darker skin have also historically been underrepresented in dermatology clinical trials. Inadequate reporting of race, ethnicity, and skin tone can make it difficult to determine whether therapies and diagnostic tools have been adequately evaluated across diverse populations.
Specialty clinics focused on skin of color may help address some gaps by providing clinicians with greater experience recognizing conditions across different pigmentation levels. However, broad improvement requires incorporating diverse populations into routine healthcare, education, research, product development, and regulatory standards.
Teledermatology and Digital Health
Teledermatology has the potential to expand specialist access, but it can also reproduce existing inequalities.
High-quality dermatologic assessment by photograph or video depends on adequate cameras, lighting, internet access, digital literacy, and image quality. Studies have identified differences in teledermatology participation and photograph submission associated with race, age, insurance status, and other social factors.
Image quality can also interact with pigmentation. Cameras, automatic exposure systems, compression algorithms, and lighting conditions may not reproduce all skin tones equally well.
Digital-health systems therefore need to be designed not merely for technical convenience but for equitable usability across different populations and skin colors.
Colorism and Population Health
Colorism refers to social advantages or disadvantages associated with lighter or darker skin tone, often operating within populations that outsiders might classify as a single racial or ethnic group.
Studies in the United States, Latin America, and other regions suggest that skin tone can influence experiences of discrimination, socioeconomic status, social treatment, and health. Research has linked colorism with self-rated health, hypertension, psychological distress, depression, sleep, and stress-related biological pathways.
These findings illustrate why public-health research sometimes needs more precise measures than broad racial categories. Two people identified as members of the same racial group may have substantially different experiences because of differences in perceived skin tone.
At the same time, researchers must distinguish between biological effects of pigmentation and health effects created by discrimination. Skin color itself does not biologically cause the social disadvantages associated with colorism; rather, social systems assign different meanings and treatment to visible differences in appearance.
Skin Lightening and Global Public Health
Skin-lightening or skin-bleaching practices are widespread in parts of Africa, Asia, the Middle East, the Americas, and other regions. Their popularity reflects a complex interaction of beauty standards, colonial history, advertising, social status, gender expectations, employment opportunities, marriage preferences, and colorism.
Some skin-lightening products contain medically hazardous ingredients. Research has identified products containing excessive concentrations of mercury, hydroquinone, and potent corticosteroids. Use can lead to irritation, abnormal pigmentation, skin thinning, infections, steroid-related complications, mercury toxicity, and other systemic health effects.
Product labeling is not always reliable, and unregulated or counterfeit products can circulate internationally through informal markets and online commerce.
Because demand is driven partly by social pressures surrounding skin color, regulation alone is unlikely to eliminate harmful use. Effective public-health responses may require product regulation, consumer education, clinical counseling, enforcement against hazardous ingredients, and broader efforts to challenge discriminatory beauty standards.
Toward More Equitable Healthcare
Improving health equity across skin tones requires changes throughout healthcare and biomedical research.
Clinical education should routinely demonstrate how diseases appear across diverse pigmentation. Medical devices should be tested using objectively measured skin tone and across clinically relevant conditions. Artificial-intelligence systems should be trained and evaluated on representative datasets. Clinical trials should include diverse populations and report demographic and pigmentation information clearly.
Public-health programs should also distinguish biological pigmentation from racial identity. Race can remain important when studying discrimination, structural inequality, healthcare access, and social determinants of health, but it should not automatically be treated as a biological proxy for skin color.
Greater precision in terminology and measurement can help researchers identify whether a disparity arises from physiology, technology, healthcare systems, socioeconomic conditions, discrimination, or some combination of these factors.
Conclusion
Skin color intersects with public health through both biology and society. Pigmentation influences ultraviolet responses, vitamin D production, disease appearance, optical measurements, and some aspects of dermatologic risk. At the same time, discrimination, colorism, unequal healthcare access, inadequate representation in medical education, research disparities, and social pressures surrounding skin tone can produce important differences in health and well-being.
The growing literature on skin color demonstrates the limitations of using broad racial categories as substitutes for pigmentation. More equitable healthcare requires objective measurement when skin pigmentation is biologically relevant, greater representation across skin tones in medical education and research, improved testing of medical devices and artificial intelligence, and stronger attention to the social conditions that convert visible differences in skin color into differences in health.
- TOC**
Public Health, Skin Color, and Health Equity
Reviews international disparities affecting people with skin of color and recommends better classification systems, research representation, education, clinical resources, and equitable dermatologic care.
Identifies international research and treatment gaps involving skin diseases, hair disorders, photoprotection, and aesthetic care in populations with darker skin.
Examines skin pigmentation as both a biological adaptation and a socially interpreted characteristic associated with discrimination, inequality, and differences in health outcomes.
Reviews how common skin diseases may appear differently in darker skin and how inadequate educational representation can contribute to delayed or missed diagnoses.
Reviews histologic differences, disorders affecting darker skin, and potential biases influencing dermatopathologic diagnosis.
Reviews common conditions disproportionately affecting darker-skinned populations and discusses effects on mental health, quality of life, diagnosis, and treatment.
Reviews structural, socioeconomic, educational, and healthcare-system factors contributing to racial and ethnic disparities in dermatologic care.
8. Disparities in Dermatology: A Reflection | Multiple authors | Dermatology and Therapy | 2022
Discusses disparities in access, provider representation, education, research, and treatment and proposes practical approaches for increasing equity in dermatology.
Reviews structural, genetic, immune, and biological differences while emphasizing that social determinants frequently contribute more to disparities than presumed racial biology.
Examines differences in clinical presentation and disparities involving inflammatory skin diseases and cutaneous malignancies.
Skin Color, Medical Diagnosis, and Technology
Examines how clinicians respond when pulse-oximetry measurements may differ systematically between darker- and lighter-skinned patients.
Reviews dozens of studies and finds recurring evidence of oxygen-saturation overestimation among people with darker pigmentation.
Uses experimental methods to investigate how pigmentation alters light absorption and can influence calculated oxygen saturation.
Finds occult hypoxemia to be more common among several racial and ethnic minority groups and evaluates possible treatment consequences.
Reviews whether pigmentation influences photoplethysmography-based oxygen saturation and wearable heart-rate measurements.
Tests pulse-oximeter performance in adults with different pigmentation levels and finds that oxygen level itself strongly influences measurement error.
Shows substantial skin-color variation within self-identified racial groups and argues that race should not be treated as a proxy for pigmentation.
Reviews available methods for measuring skin tone and calls for standardized pigmentation assessment rather than reliance on race or ethnicity.
Reviews evidence that skin pigmentation can affect oximeter performance and discusses clinical and engineering responses.
Finds evidence that pulse oximeters can overestimate oxygen saturation in people with higher levels of skin pigmentation, particularly under some clinical conditions.
Examines racial differences in occult hypoxemia and evaluates their association with hospital outcomes.
Examines device calibration, skin pigmentation, regulatory standards, and the potential health consequences of inaccurate oxygen measurements.
Discusses the clinical implications of racial and ethnic differences in pulse-oximetry accuracy.
Landmark study reporting that occult hypoxemia was substantially more frequent among Black hospitalized patients than White patients with similar pulse-oximeter readings.
An influential controlled study showing reduced oximeter accuracy in darkly pigmented participants at low oxygen saturation.
Artificial Intelligence, Imaging, and Diagnostic Bias
Demonstrates that skin tone can be encoded within hyperspectral imaging data and may become a confounding factor in medical AI models.
Finds large deficiencies in both darker-skin representation and diagnostic accuracy among images generated by several AI systems.
Finds that common generative-AI systems overwhelmingly produced lighter-skinned dermatologic images.
Studies the effects of skin tone and imaging conditions on thermography used for detecting tissue injury and pressure injuries.
Shows that prompting AI systems with demographic information can substantially improve skin-tone representation in generated medical images.
Medical Education and Recognition of Disease
Reviews educational interventions and finds that targeted training generally improves diagnostic knowledge and confidence for darker skin.
Proposes a standardized method for evaluating how effectively residency programs incorporate skin-of-color education.
Examines representation of lupus, dermatomyositis, systemic sclerosis, vasculitis, and related diseases across different skin tones.
Reports increased student confidence after dermatology teaching materials were revised to include more diverse skin tones.
Documents inadequate representation of skin cancers in darker skin within major educational resources.
Documents inadequate representation of darker skin in medical education and calls for comprehensive curriculum reform.
Examines underrepresentation in dermatology research, clinical trials, the medical workforce, and leadership.
Finds that even a focused educational module can improve healthcare-provider diagnostic accuracy and confidence for conditions in darker skin.
Finds that only a small percentage of images in major dermatologic-surgery textbooks depict darker Fitzpatrick skin types.
Surveys dermatology residents and identifies persistent gaps in formal education, clinical exposure, and dedicated skin-of-color training.
Examines continued underrepresentation of darker skin in dermatology textbook photographs.
Assesses whether dermatology textbooks have improved representation of darker skin over time.
Finds inadequate darker-skin representation in undergraduate dermatology teaching and links representation to diagnostic confidence.
Evaluates skin-tone representation in pediatric dermatology textbooks and highlights gaps in educational imagery.
Finds substantial underrepresentation of Fitzpatrick skin types V and VI compared with population distributions.
Early national survey documenting limited formal training and clinical exposure involving diseases particularly relevant to patients with darker skin.
Vitamin D, UV Radiation, and Pigmentation
Finds vitamin-D levels associated with latitude, sun exposure, body mass index, supplementation, and skin color.
Reviews interactions among pigmentation, ultraviolet exposure, vitamin-D metabolism, genetics, migration, and human adaptation.
Finds substantially increased odds of vitamin-D deficiency during pregnancy among women with darker skin.
Randomized trial finds that darker-skinned children required greater dietary vitamin-D intake to maintain adequate winter concentrations.
Reports a high pooled prevalence of vitamin-D deficiency among dark-skinned migrant populations living at higher latitudes.
Uses nationally representative U.S. data to examine the combined influence of body weight and skin-color-associated population differences on vitamin-D status.
Investigates whether geographic variation in ultraviolet radiation could contribute to population differences in birth outcomes through vitamin-D pathways.
54. Skin Color Is Relevant to Vitamin D Synthesis | Multiple authors | Dermatology | 2013
Experimental study reporting a smaller increase in vitamin-D levels after standardized UVB exposure among very dark-skinned participants.
Examines associations among socioeconomic conditions, skin color, vitamin-D status, and self-rated health in U.S. survey data.
56. Vitamin D and Skin of Color: A Call to Action | Susan C. Taylor | Cutis | 2012
Discusses vitamin-D insufficiency in skin-of-color populations while emphasizing unresolved questions concerning genetics and appropriate reference levels.
Compares objective skin color, ethnicity, sun sensitivity, and vitamin-D concentrations in a multiethnic population.
Uses objective color measurements and finds that sun exposure can be more important than constitutive pigmentation in determining vitamin-D status.
Examines dose-response relationships between UVB exposure, pigmentation, and circulating vitamin-D concentrations.
60. Vitamin D and African Americans | Susan S. Harris | Journal of Nutrition | 2006
Reviews the high prevalence of low vitamin-D concentrations among African Americans and the influence of pigmentation on cutaneous synthesis.
61. Vitamin D Deficiency in Breastfed Infants in Iowa | Multiple authors | Pediatrics | 2006
Reports that wintertime deficiency was particularly frequent among unsupplemented infants and more common among dark-skinned infants.
Classic experimental paper examining how epidermal melanin affects UVB-driven vitamin-D production.
Human Pigmentation, Evolution, and Public Health
63. The Genetics and Evolution of Human Pigmentation | Multiple authors | Biology | 2025
Reviews pigmentation genes, UV adaptation, convergent evolution, and global variation in human skin color.
Integrates pigmentation genetics, UV geography, folate, vitamin D, diet, antioxidants, and migration into models of human skin-color evolution.
Reviews pigmentation as a flexible adaptation shaped by ultraviolet radiation, migration, genes, and cultural practices.
Combines ultraviolet exposure, pigmentation genes, folate, vitamin D, and antioxidant data to test an influential evolutionary hypothesis.
Reviews genetics, natural selection, geographic variation, and competing explanations for worldwide pigmentation diversity.
Reviews the importance of cutaneous vitamin-D production in human evolution and its relationship with varying pigmentation.
Evaluates evidence that pigmentation evolved partly to balance UV-dependent vitamin-D production against UV-associated folate degradation.
Explores barrier-function and metabolic hypotheses for the initial evolution and later reduction of epidermal pigmentation.
Connects the evolution of pigmentation with folate protection, vitamin-D synthesis, migration, and contemporary risks of deficiency and skin cancer.
Seminal paper linking geographic ultraviolet radiation to worldwide patterns of human skin pigmentation.
Skin Classification and Measurement
Reviews why Fitzpatrick skin type should not be substituted for objective pigmentation measurement or racial classification.
Reviews 17 classification systems and describes substantial limitations in current methods of categorizing skin color.
75. Racial Limitations of Fitzpatrick Skin Type | Olivia R. Ware et al. | Cutis | 2020
Warns against treating the Fitzpatrick phototype system as a direct measure of race, ethnicity, or constitutive skin color.
Demonstrates that race, skin color, hair color, and eye color are imperfect predictors of individual sun sensitivity.
Finds that standard Fitzpatrick categories poorly describe many Black respondents and can distort estimates of sun sensitivity.
Photoprotection and Sun Exposure
Reviews misconceptions, cultural factors, education, family influences, and other barriers influencing sun-protective behavior.
Finds that only a small fraction of the sunscreen literature specifically addresses darker skin and that clinical trials remain limited.
Reviews UV, UVA, and visible-light effects and provides photoprotection recommendations relevant across the pigmentation spectrum.
81. Photoprotection in Skin of Color | Multiple authors | Current Dermatology Reports | 2022
Reviews physiological and clinical differences in light exposure and discusses inadequate photoprotection education among darker-skinned populations.
Reviews how pigmentation influences DNA photodamage, immunosuppression, vitamin-D production, sunburn, and skin-cancer risk.
Skin Cancer and Melanoma Disparities
Updated meta-analysis reports continuing racial and ethnic differences in melanoma survival outcomes.
Reviews a melanoma subtype constituting a larger share of melanoma cases in Black, Hispanic, and Asian populations.
Finds differences in insurance, treatment delays, socioeconomic conditions, amputation, and survival among patients with acral melanoma.
Suggests that delayed diagnosis and socioeconomic circumstances alone may not fully explain poorer ALM outcomes among Black patients.
Reviews melanoma epidemiology, anatomical distribution, subtype differences, and clinical presentation among populations with skin of color.
Examines later diagnosis, screening, socioeconomic barriers, education, UV exposure, and interventions aimed at reducing melanoma mortality disparities.
Uses national cancer-registry data to clarify absolute and proportional ALM incidence across racial and ethnic populations.
Finds inadequate representation of acral melanoma and darker-skinned patients in educational materials.
Meta-analysis documents significant differences in melanoma survival between White and racial-minority populations.
Finds that the greater prevalence of acral melanoma does not fully explain racial differences in major amputation and care.
Shows that socioeconomic status and stage contribute importantly to observed survival disparities.
Finds longer delays between diagnosis and definitive treatment among Black melanoma patients even after adjustment for socioeconomic characteristics.
SEER analysis finds substantial differences in acral-melanoma distribution and survival among racial and ethnic populations.
Reviews major skin cancers in darker-skinned populations and explains why lower incidence does not eliminate important outcome disparities.
Large SEER analysis finds poorer melanoma survival among several non-White populations despite lower overall melanoma incidence.
Disease Burden, Quality of Life, and Access
Reviews disproportionately high hidradenitis suppurativa burden among Black Americans, including greater severity, diagnostic delays, structural barriers, and reduced access to specialist care.
Reviews population differences in prevalence, clinical presentation, immune phenotype, and disease burden of atopic dermatitis.
Colorism, Discrimination, and Population Health
100. Colorism and Sexual Health: A Rapid Review | Multiple authors | PubMed-indexed review | 2026
Reviews evidence linking colorism with sexual agency, sexualization, risk behaviors, relationships, self-esteem, and HIV-related sexual functioning among Black and Brown women and girls.
Finds that darker-skinned young adults experienced more ethnic-racial discrimination, which was associated with altered cortisol rhythms and potentially poorer physical health.
Examines objectively measured skin tone and several dimensions of sleep health among Black women, illustrating another pathway through which color-based social inequality may influence health.
Reviews research connecting colorism with physical and mental health, dermatologic inequities, socioeconomic differences, discrimination, and skin-lightening practices.
Finds that skin tone can modify the association between discrimination and psychological distress, particularly among darker-skinned older adults.
Finds that perceived colorism is associated with poorer physical health among African Americans and argues that skin-color discrimination should be measured separately from broader racial discrimination.
Finds significant health differences by skin color in Puerto Rico and suggests pigmentation can reveal disparities obscured by broad racial and ethnic categories.
Finds that perceived racial discrimination, rather than skin color by itself, was strongly associated with major depression among adolescents.
Uses sibling comparisons to find an association between darker skin tone and hypertension that persists after accounting for shared family background.
Examines discrimination, skin color, anxiety, depression, and common mental disorders and recommends incorporating pigmentation into public-health research on discrimination.
Examines nationally representative data and finds that skin tone predicts discrimination as well as differences in mental health, physical health, and self-rated health.
Finds a gradient in self-rated health by skin color across several Latin American countries, with socioeconomic disadvantage and discrimination contributing substantially.
Atopic Dermatitis and Psoriasis in Skin of Color
Reports substantial differences in quality-of-life burden, transportation, cultural and language barriers, treatment costs, and healthcare access.
Develops expert recommendations for terminology, diagnosis, differential diagnosis, and management of psoriasis in patients with skin of color.
Reviews global evidence showing differences in severity, presentation, quality-of-life burden, treatment access, and clinical-research representation.
Reviews representation and treatment outcomes among skin-of-color participants receiving biologic therapy for psoriasis and atopic dermatitis.
Discusses disease phenotypes, environmental exposures, healthcare access, research representation, and clinical management of atopic dermatitis in diverse populations.
117. Disparities in Care for Psoriasis | Roman Drozdowski et al. | Dermatologic Clinics | 2024
Reviews how race, ethnicity, language, income, insurance, geography, age, and other social factors can contribute to inequitable psoriasis treatment.
118. Diagnosing Psoriasis in Skin of Color Patients | Multiple authors | Dermatologic Clinics | 2023
Reviews diagnostic challenges caused by variations in psoriasis appearance in darker skin and discusses differential diagnoses, biopsy, treatment, and culturally appropriate care.
Explains that erythema and disease severity may be underestimated in darker skin and reviews differences in morphology, pigmentation, and treatment considerations.
Reviews pediatric eczema presentation in darker skin and explains how atypical morphology and less-visible erythema can cause misdiagnosis or underestimation of severity.
Reviews racial and ethnic variations in psoriasis presentation, quality-of-life effects, skin-barrier function, and treatment.
Reviews racial and ethnic disparities in diagnosis, treatment, clinical research, healthcare workforce diversity, and patient participation in psoriasis research.
Finds that non-White psoriasis patients more frequently report lack of culturally competent healthcare as a barrier to treatment.
Acne, Hidradenitis, Vitiligo, and Pigmentary Disorders
Reports greater daily-life, emotional, anxiety, depression, and quality-of-life burden among vitiligo patients with darker skin.
Examines differences in pediatric hidradenitis suppurativa characteristics and treatment across racial groups and identifies areas needing further investigation.
Finds a strong relationship between vitiligo severity and poorer quality of life among patients with skin of color.
Finds differences in dermatologic concerns, product availability, information sources, and health literacy between skin-of-color and White patients.
Reviews genetic, medical, environmental, socioeconomic, and healthcare-access factors affecting hidradenitis suppurativa.
Develops consensus recommendations addressing acne presentation, prevention, treatment goals, skin care, and pigmentation in diverse populations.
130. Hidradenitis Suppurativa in Skin of Colour | Multiple authors | Experimental Dermatology | 2021
Discusses the disproportionate burden of hidradenitis suppurativa among some skin-of-color populations and severe gaps in international research representation.
Reviews acne treatment while emphasizing post-inflammatory hyperpigmentation, keloid risk, topical therapies, oral medications, lasers, and phototherapy.
Reviews treatment strategies for acne in darker skin with special attention to pigmentation, scarring, irritation, and psychological effects.
Reviews clinical and histologic differences in acne among patients with skin of color and highlights risks of post-inflammatory pigmentation and scarring.
Dermatology Access, Research, and Healthcare Equity
Finds higher odds of alopecia, hypertrophic scars, acne, and hidradenitis among women of color and lower rates of cosmetic procedures.
Identifies care gaps related to cultural diversity, income, racial bias, and underrepresentation in medical education and research.
Finds that only a small proportion of cosmetic dermatology literature adequately represents skin-of-color populations and darker Fitzpatrick types.
Finds limited reporting and validation of widely used dermatologic severity measures across different skin tones.
Finds substantial rates of changed diagnoses and treatment plans when patients previously seen elsewhere were evaluated in a specialized skin-of-color clinic.
Finds Hispanic patients with skin disease considerably less likely to receive outpatient dermatology care and more likely to rely on primary care.
Finds Black and Hispanic patients disproportionately affected by cost, transportation, childcare, employment, rural-access, and workforce-diversity barriers.
Finds inadequate racial, ethnic, and Fitzpatrick-skin-type reporting in trials of common dermatologic diseases.
Finds significant underrepresentation of minority populations, particularly Black participants, even after accounting for disease prevalence.
Reports racial differences in physician access, skin examinations, procedures, and follow-up among patients treated for skin ulcers.
Finds that areas with low dermatologist density contain proportionally larger Black and Hispanic populations, suggesting geographic access inequities.
Finds inadequate racial and ethnic representation in randomized trials of psoriasis, eczema, acne, vitiligo, alopecia, and other dermatologic diseases.
Teledermatology, AI, Wearables, and Technology
Finds unequal adoption of direct-to-patient teledermatology and identifies groups that may require additional technological support and outreach.
Tests an AI approach designed to reduce skin-tone-related diagnostic disparities without requiring explicit skin-tone labels during training.
Describes a multimodal wearable sensor designed to provide more consistent physiological measurements across different Fitzpatrick skin types.
Uses objective pigmentation measurements to test whether epidermal melanin affects wearable heart-rate accuracy during exercise and recovery.
Finds physicians were less accurate on dark-skin images and shows that AI support can improve overall diagnosis without necessarily eliminating disparities.
Finds poor race and ethnicity reporting in trials of a condition disproportionately affecting several skin-of-color populations.
Finds inadequate inclusion and reporting of racial minorities, language, income, education, device access, and other determinants of digital inequity.
Finds differences in teledermatology use according to race, insurance, age, and other demographic characteristics.
Finds Black, older, male, and Medicaid patients were less likely to submit photographs or participate in video-based dermatology visits.
Demonstrates substantially poorer AI and clinician diagnostic performance on darker skin and shows that diverse training data can reduce performance gaps.
Pressure Injuries, Jaundice, and Clinical Recognition
Reviews strategies for detecting early pressure injury when traditional color changes are difficult to see in richly pigmented skin.
Evaluates noninvasive jaundice assessment in darkly pigmented newborns, where visual recognition of jaundice is particularly unreliable.
Quantifies pigmentation changes in African newborns and discusses implications for optical diagnostic devices used during early infancy.
Reviews practical strategies for improving skin and wound assessment when familiar color cues are less visible in darker skin.
Reviews presentations of lupus and dermatomyositis in darker skin to reduce diagnostic delays and errors.
Reviews evidence that transcutaneous bilirubin meters may systematically overestimate bilirubin in darker-skinned infants.
Finds gaps in clinician confidence when identifying cutaneous lupus manifestations in darker skin and links them to insufficient educational representation.
Uses a clinical case to illustrate the consequences of inadequate assessment and delayed pressure-injury recognition in darkly pigmented skin.
Discusses diagnostic limitations of visual skin assessment and technological approaches that could improve early detection.
Explains why redness-based assessment can fail in darker skin and recommends a broader approach incorporating tactile and other clinical signs.
Rosacea, Alopecia, Acne, and Hyperpigmentation
Uses clinical cases to show how assumptions based on race or gross appearance can produce incorrect alopecia diagnoses.
Reviews therapies for post-inflammatory hyperpigmentation while emphasizing risks of irritation and treatment-induced pigmentation in darker skin.
Provides a treatment algorithm designed to address acne and pigmentation complications in diverse patient populations.
Finds insufficient racial and ethnic diversity in cosmetic randomized trials and calls for more representative research populations.
Reviews epidemiology, presentation, diagnosis, and treatment of rosacea in patients with darker skin types.
Reviews rosacea mimickers and clinical clues intended to improve recognition and reduce delayed or incorrect diagnosis among patients with skin of color.
Argues that rosacea is underdiagnosed in darker skin partly because erythema and telangiectasia are more difficult to recognize.
Finds that patients of color rarely receive a rosacea diagnosis even when presenting with symptoms compatible with the disease.
Discusses differences in presentation, pigmentation, treatment safety, cultural considerations, and patient priorities.
Evaluates rosacea therapy across lighter and darker Fitzpatrick skin types and highlights underrepresentation of skin-of-color patients in therapeutic trials.
Reviews melasma and post-inflammatory hyperpigmentation and their psychological and quality-of-life effects.
Skin Lightening, Colorism, and Global Public Health
Reviews the worldwide prevalence, social drivers, health complications, regulation, and public-health implications of skin bleaching.
Examines whether educational attainment influences use, knowledge, and risk awareness surrounding skin-lightening products.
Examines colorism, media, socioeconomic pressures, harmful ingredients, systemic complications, mental health, and public-health responses.
Finds growing worldwide search interest in skin whitening and hazardous agents such as hydroquinone and mercury, especially in parts of Africa and Asia.
Finds widespread use of topical lightening products and concludes that stronger education and product regulation are needed.
Synthesizes product testing, usage patterns, biomonitoring, and health outcomes from studies across more than 20 countries.
Reviews skin-lightening practices in Africa, Asia, the Middle East, and the Americas as a global dermatologic and women's-health issue.
184. Skin-Lightening Products: Consumer Preferences and Costs | Anh-Dao Cheng et al. | Cureus | 2021
Examines online skin-lightening products, ingredients, consumer ratings, prices, and the strong commercial demand surrounding pigmentation alteration.
Reviews common bleaching ingredients, prevalence, dermatologic and systemic complications, and culturally sensitive approaches to patient counseling.
Finds widespread use associated with beliefs linking lighter skin to beauty, self-esteem, social class, marriage, and employment opportunities.
Examines skin lightening through biological, psychological, cultural, historical, colonial, media, and colorism-related perspectives.
Finds many tested products exceeded regulatory limits for mercury, hydroquinone, or potent topical corticosteroids and that product labeling was frequently inaccurate.
Toxic Ingredients and Regulation of Skin-Lightening Products
Reviews lead, cadmium, mercury, arsenic, chromium, and nickel exposure from cosmetics, including skin-whitening preparations.
Evaluates skin-lightening creams for hazardous active ingredients and considers their toxicological and regulatory implications.
Examines legal and regulatory problems involving mislabeling, counterfeit products, mercury, hydroquinone, and skin-lightening cosmetics.
Tests skin-whitening products sold in Morocco and highlights continued consumer exposure to mercury-containing cosmetics.
Reports widespread nonprescription use, frequent hydroquinone exposure, and adverse effects including irritation, redness, and paradoxical darkening.
Finds mercury contamination particularly concentrated in unregistered products, with some concentrations greatly exceeding regulatory limits.
Finds high skin-lightener use associated with beliefs about social advantage, poor knowledge, socioeconomic status, and measures of mental health.
Documents continued mercury contamination in skin-whitening creams and supports rapid product screening as a public-health intervention.
Measures mercury and hydroquinone in products used in Ghana and evaluates potential consumer-health risks.
Identifies illegal or excessive concentrations of several medically important ingredients in skin-lightening products sold in Cape Town.
Tests hundreds of products from numerous countries and finds some contained extremely high mercury concentrations.
