73 citations
,
November 2005 in “Journal of Investigative Dermatology Symposium Proceedings” Some women with common hair loss may develop permanent hair loss.
72 citations
,
July 2003 in “Journal of cosmetic dermatology” Frequent hair coloring and styling can damage hair and cause breakage or loss.
40 citations
,
February 2002 in “International Journal of Dermatology” Permanent hair dye damages hair but it mostly recovers after 8 weeks; using certain hair care products can help repair it.
24 citations
,
January 2001 in “International Journal of Cancer” Permanent hair dye use may increase bladder cancer risk, especially in female smokers with certain genetic traits.
12 citations
,
December 2017 in “Food and chemical toxicology” Permanent hair dye mixtures can irritate and damage the skin.