Bleaching hair twice makes it very dry and weak.
17 citations
,
April 2002 in “Contact Dermatitis” Minoxidil 5% caused skin discoloration in a man using it for hair loss.
7 citations
,
September 2021 in “Journal of Applied Polymer Science” Cuttlefish ink melanin protects hair from UV damage.
450 citations
,
January 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” Hair color is determined by melanin produced and transferred in hair follicles.
20 citations
,
June 2011 in “ISRN Dermatology (Print)” A woman lost most of her hair due to an allergic reaction to a hair dye ingredient.
47 citations
,
June 2015 in “Contact Dermatitis” A standardized patch test for hair cosmetics is needed in Europe to prevent allergies, especially for hairdressers.
Sea cucumber extract reduces hair loss and improves scalp health after dyeing.
November 2025 in “Journal of Ayurveda and Integrated Medical Sciences” Herbal hair dyes are safe, effective, and beneficial for hair health.
53 citations
,
November 1997 in “Journal of Forensic Sciences” Darker hair in guinea pigs holds more codeine than lighter hair.
2 citations
,
November 2024 in “JAAD reviews.” Certain drugs can change hair color, either lightening or darkening it.
1 citations
,
November 2019 in “International Journal of Women's Dermatology” Ketoconazole shampoo can cause rare pink hair discoloration.
1 citations
,
January 2023 in “Indian Journal of Animal Research” A new method effectively stains hair samples for study without losing hair sections.
April 1986 in “CRC Press eBooks” Hair color is determined by melanins produced in hair cells.
January 2016 in “International archives of medicine” Hair coloring is strongly linked to hair damage and scalp problems.
7 citations
,
January 1995 Silicone pretreatment protects hair from damage and reduces color fading without interfering with bleaching or dyeing.
1 citations
,
January 2012 in “Human health handbooks” Hair color is determined by melanin types and gene activity.
26 citations
,
July 2007 in “Biochemical Pharmacology” ISCK03 stops melanin production in human melanoma cells and lightens skin color in mice and guinea pigs.
72 citations
,
July 2003 in “Journal of cosmetic dermatology” Frequent hair coloring and styling can damage hair and cause breakage or loss.
2 citations
,
March 2018 in “The Journal of Dermatology” The "color-transition sign" helps tell apart alopecia areata incognita from telogen effluvium by looking at hair color changes.
July 2018 in “Journal of The American Academy of Dermatology” Fluorescent tattoos are a good way to mark the scalp for hair treatments because they're accurate, invisible in normal light, and have low risk.
January 2006 in “Journal of Society of Cosmetic Chemists of Japan” The new hybrid polymer improves dyed hair's color, feel, and manageability.
August 2023 in “Dermatology Reports” Minoxidil, a common hair treatment, may cause hair to turn grey or change color, especially with long-term use or if you have a family history of grey hair.
25 citations
,
October 1985 in “Archives of Ophthalmology” The pigment in black eyeliner can spread in the skin and may cause permanent eyelash loss.
27 citations
,
January 1995 Melanin in black hair protects it from sun damage better than light-brown hair.
February 2005 in “CRC Press eBooks” Hair color is due to active pigment cells in hair during growth.
17 citations
,
August 1979 in “Journal of The American Academy of Dermatology” A new staining method helps tell growing from resting hairs to diagnose hair loss.
July 1989 in “British Journal of Dermatology” Long-term use of canthaxanthin may cause reversible changes in the eye, including crystal deposits and altered vision responses.
June 2021 in “Research Square (Research Square)” Dyed chitin nanofibers are strong, colorful, and water-resistant, enhancing resin strength and color.
June 2010 in “DR-NTU (Nanyang Technological University)” Hair coloring and chlorine change hair strength differently.
20 citations
,
August 1981 in “Developmental Medicine & Child Neurology”