Hair ages by graying and thinning, treatable with medications, transplants, or hair dye.
January 2025 in “Conservation Physiology” Bear hair grows 0.10 to 1.05 mm per day, varying by individual and season.
June 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Henna is a safer alternative to synthetic hair dyes but has limited color options.
66 citations
,
February 1985 in “Archives of dermatological research” Hair dyes penetrate the scalp very minimally, less than 1%.
6 citations
,
January 2020 in “Elsevier eBooks” Nanoparticles could make hair dyes safer by reducing harmful effects.
December 2025 in “Biomedicine & Pharmacotherapy” Melamax® protects skin from UV damage and reduces inflammation and oxidative stress.
89 citations
,
May 2005 in “Stem Cells” Mouse skin has special cells in the epidermis that decrease with age and are linked to keratinocyte stem cells.
28 citations
,
December 2011 in “Biocatalysis and biotransformation” PDI helps restore over-bleached hair's strength and structure by attaching special peptides.
17 citations
,
April 2002 in “Contact Dermatitis” Minoxidil 5% caused skin discoloration in a man using it for hair loss.
7 citations
,
June 2019 in “Coloration Technology” Translucent keratin films are better for testing hair dyes.
2 citations
,
December 1988 in “PubMed” C.I. Acid Orange 3 caused cancer in female rats but not in male rats or mice.
1 citations
,
May 2018 in “Research & Reviews: Journal of Herbal Science” The research helps standardize Henna leaf for safe use in traditional medicine and hair care.
1 citations
,
August 1999 in “ACS symposium series” Polymer JR400 sticks to hair but washes off with detergent.
March 2026 in “International Journal of Science and Research Archive” Hair coloring in 2026 requires precise science and safe techniques.
191 citations
,
November 1959 in “Annals of the New York Academy of Sciences” Hair and wool have complex microscopic structures with microfibrils and varying cystine content.
46 citations
,
June 1992 in “Arthritis & Rheumatism” Hair products don't affect lupus development or severity.
28 citations
,
January 2003 in “Skin pharmacology and physiology” Melatonin affects skin cell growth differently based on how much and how long it's used.
9 citations
,
December 2010 in “Journal of The European Academy of Dermatology and Venereology” Latanoprost therapy potentially caused a woman's white hair to darken again.
9 citations
,
April 1985 in “Canadian Journal of Zoology” Moose have unique interdigital glands with green hairs and larger glands during mating season.
5 citations
,
October 2018 in “Journal of Mind and Medical Sciences” Sentinel lymph node mapping is safe and effective for early-stage ovarian cancer but isn't yet standard practice.
2 citations
,
November 2010 in “Obstetrics and Gynecology Clinics of North America” Laser therapy is a safe, effective, and preferred treatment for spider veins.
2 citations
,
January 2007 in “Actas Dermo-Sifiliográficas” Two cases of hairy elbows syndrome were described, with normal skin texture and symmetrical hair growth.
June 2025 in “BMJ Case Reports” Axitinib treatment turned a man's grey hair back to black.
February 2025 in “International Journal of Research Publication and Reviews” Butterfly pea flower is valued for its health benefits, color-changing ability, and use in food and drinks.
Hair product allergies are common, especially to hair dyes, and hairdressers are at higher risk.
June 2021 in “Research Square (Research Square)” Dyed chitin nanofibers are strong, colorful, and water-resistant, enhancing resin strength and color.
February 2020 in “International research journal of pharmacy” The emulsion made from tea plant and onion extracts shows promise for treating hair loss.
January 2020 in “JAAD case reports” Hair loss condition FFA was seen before the appearance of skin depigmentation vitiligo in a patient.
January 2018 in “Indian Dermatology Online Journal” Trichoscopy can help tell the difference between artificial hair fibers and other scalp artifacts.
July 2012 in “International Journal of Trichology” Understanding hair health and disorders is important for effective treatment.