September 2012 in “British Small Animal Veterinary Association eBooks” The document concludes that pigmentation disorders in animals involve complex interactions between melanocytes and keratinocytes.
April 2012 in “J. Willard Marriott Library” Cannabinoids like THC and THCA get into hair through skin oils, not hair color.
Ethnic differences in skin and hair affect penetration minimally, but cultural habits matter in product development.
November 2011 in “Journal of Investigative Dermatology” TRH in hair follicles can influence hair color by increasing melanin.
Prunus Tomentosa extract is effective in promoting hair growth, similar to minoxidil.
February 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Fluphenazine and iloprost can induce hair growth.
January 2010 in “Chinese Journal of Aesthetic Medicine” Melasma skin has more melanin and signs of aging, with strong CK10 expression linked to cell differentiation and aging.
January 2010 in “Pharmacy Today” Collagen reduces skin melanin, boosts antioxidants, and improves skin moisture.
March 2009 in “Chinese Journal of Dermatology” Melanocytes in the outer root sheath are likely stem cells that grow fast but stay immature.
January 2009 in “Actas dermo-sifiliográficas/Actas dermo-sifiliográficas” Lasers and light treatments are now the most common ways to remove hair.
January 2008 in “Linchuang pifuke zazhi” Betamethasone activates and increases the growth of certain skin cells from hair follicles.
March 2007 in “International Journal of Cosmetic Science” Hair with more melanin resists weather damage better.
The 16th-century mummy's hair was well-preserved due to a calcium coating.
January 2004 in “Banca y finanzas: Revista profesional de gestión financiera” Androgens increase pigmentation in certain hamster skin areas, but estrogens can reverse this effect.
A white-tailed deer fawn in South Dakota was the first cervid found with congenital hypotrichosis, a condition causing sparse or missing hair.
January 2003 in “Linchuang pifuke zazhi” Melanin granules can be expelled by exocytosis.
January 1999 in “Journal of the European Academy of Dermatology and Venereology” RAPK is a rare skin disorder with pigmented spots, mainly on hands and feet, starting in youth.
January 1990 in “Springer eBooks” Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.
Oral contraceptives can affect skin and hair, improve acne, but may cause pigmentation, dermatitis, and other conditions.
April 2022 in “DOAJ (DOAJ: Directory of Open Access Journals)” Polygonum multiflorum may treat hair loss by reducing inflammation and stress, and boosting melanin.
127 citations
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November 2010 in “Pigment cell & melanoma research” We need more research on human hair follicle pigmentation, not just mouse models.
82 citations
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January 1997 in “Forensic science international” Drugs can be incorporated into hair based on their chemical properties and hair pigmentation.
38 citations
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June 2005 in “Acta Biochimica Polonica” Splenic eumelanin in C57BL/6 mice is different from hair eumelanin.
25 citations
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October 2012 in “Dermatologic clinics” Laser and light treatments can effectively remove hair long-term.
3 citations
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March 2008 in “Medical laser application” Lasers have become safer and more effective for treating skin problems and hair removal.
1 citations
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January 2009 in “Elsevier eBooks” Laser hair removal can be effective for darker skin but requires careful use to avoid side effects.
October 2025 in “International Journal of Research in Dermatology” New laser technologies and methods are safer and more effective for hair removal on darker skin tones.
January 2019 in “International Journal of Plant Animal and Environmental Sciences” The extract from marine green alga Chlamydomonas sp. W80 has antioxidant, anti-inflammatory, anti-aging, hair growth, immune-boosting, and skin lightening effects.
8 citations
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June 2022 in “International Journal of Molecular Sciences” Tiny particles called extracellular vesicles show promise for skin improvement and anti-aging in facial care but face challenges like low production and lack of research.
3 citations
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November 2022 in “Frontiers in Oncology” Melanin may help melanoma cells grow by aiding their metabolism.