February 2005 in “CRC Press eBooks” Hair color is due to active pigment cells in hair during growth.
12 citations
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May 2023 in “EMBO reports” High mTORC1 activity slows hair growth and causes it to lose color.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Hair dyeing changes hair structure, but new technologies help protect hair while coloring.
18 citations
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February 2014 in “PubMed” Androgenetic alopecia is a common hair loss condition caused by testosterone effects on hair follicles, leading to thinner, shorter, and less pigmented hair, diagnosed using scalp dermoscopy and treated with topical minoxidil, antiandrogen agents, and 5-alpha reductase inhibitors.
April 2025 in “Health Science Reports” Smoking and lighter hair color increase alopecia risk, especially in women and those over 25.