10 citations
,
March 2016 in “Toxicology and applied pharmacology” Using A132 hair dye with sunlight can cause skin damage and hair loss.
6 citations
,
December 2019 in “International Journal of Cosmetic Science” White hair has weaker tryptophan fluorescence than other unpigmented fibers, possibly due to UV exposure or unknown substances.
26 citations
,
July 2007 in “Biochemical Pharmacology” ISCK03 stops melanin production in human melanoma cells and lightens skin color in mice and guinea pigs.
December 2021 in “Cosmetics”
May 2021 in “GSC Advanced Research and Reviews” Hair color is influenced by genetics and can indicate certain health conditions.
1 citations
,
January 1988 Cosmetic treatments after chlorination damage hair more than treatments before.
September 2022 in “bioRxiv (Cold Spring Harbor Laboratory)” A new staining method shows a special area in the hair's skin layer with lots of proteoglycans.
20 citations
,
August 1981 in “Developmental Medicine & Child Neurology” 13 citations
,
June 1981 in “Developmental Medicine & Child Neurology” 1 citations
,
September 2003 in “Annals of Epidemiology” Hair care products can cause skin irritation and allergies.
53 citations
,
November 1997 in “Journal of Forensic Sciences” Darker hair in guinea pigs holds more codeine than lighter hair.
10 citations
,
January 2016 in “ACG Case Reports Journal” Long-term Cape Aloe use causes harmless colon pigmentation that can help detect polyps.
10 citations
,
January 2011 in “Skin research and technology” Procyanidin oligomers can protect hair from oxidative damage and could be good for hair care products.
5 citations
,
October 2007 in “PubMed” Amino acids in conditioners improve hair strength, hydration, and color retention.
18 citations
,
March 2009 in “Skin pharmacology and physiology” Sunlight damages hair, causing cuticle loss, protein changes, and discoloration.
1 citations
,
October 2023 in “PloS one” Cosmetic hair treatments can increase hair testosterone levels, while natural hair color does not affect it.
17 citations
,
April 2004 in “Acta Clinica Belgica” UV light makes skin signs of lack of carotene and vitamin A more visible.
July 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Herbal cosmetics are beneficial but need more testing and standardization for global use.
January 2016 in “International archives of medicine” Hair coloring is strongly linked to hair damage and scalp problems.
September 2024 in “Heliyon” Repeated hair dyeing significantly damages hair.
Bleaching hair twice makes it very dry and weak.
February 2005 in “CRC Press eBooks” Hair color is due to active pigment cells in hair during growth.
July 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Herbal cosmetics are beneficial but need more testing and standardization for global use.
January 2025 in “Analytical Methods” A new fluorescent material can detect dextran sulfate sodium, turning green when present, useful for forensic and environmental monitoring.
6 citations
,
September 2010 in “Pigment Cell & Melanoma Research” We know less about human hair pigmentation than mouse coat color, but pH and cysteine levels are key factors.
1 citations
,
May 2012 in “Clinical and Experimental Dermatology” Iron can be present in hair color changes without overall iron deficiency.
June 2017 in “University of the Arts London Research Online (University of the Arts London)” Polymers help reduce damage and improve bleached hair when used during or after bleaching.
4 citations
,
January 2018 in “Urology & Nephrology Open Access Journal” Hair dye chemicals can cause serious health problems, including kidney damage.
September 2018 in “University of the Arts London Research Online (University of the Arts London)” L-arginine, hydrolysed keratin, and cystine-silanol copolymer can help protect hair from damage during and after bleaching.