4 citations
,
January 1976 in “Archives of Dermatological Research” Metabolic disorders can cause hair structure defects and growth issues, but amino acid levels in hair remain normal.
81 citations
,
October 2014 in “The journal of investigative dermatology/Journal of investigative dermatology” Certain genes control the color of human hair by affecting pigment production.
15 citations
,
January 1971 in “British Journal of Dermatology” Hair can indicate early signs of metabolic disorders, with issues like protein deficiency stopping hair growth.
15 citations
,
October 1970 in “Archives of disease in childhood” Hair amino acid levels can indicate metabolic disorders.
2 citations
,
January 2017 in “Journal of Pigmentary Disorders” Genetics, stress, and health issues can cause early hair greying, which affects self-esteem, and there's no cure, only hair dye.