TLDR DHT, not testosterone, mainly affects hair growth and related conditions.
The document discussed the hormonal control of hair growth, focusing on the role of dihydrotestosterone (DHT) as the active form of testosterone in hair follicles. It highlighted that glucose-6-phosphate-dehydrogenase (G6PDH) activity, stimulated by cyclic adenosine monophosphate (AMP), increased significantly during the anagen phase of hair growth. The study noted a correlation between alopecia progression and declining androgen levels, emphasizing that 5α-DHT, rather than testosterone, stimulated matrix cells in hair follicles, particularly in women with hirsutism. This mechanism was also relevant to sebaceous gland activity in acne.
21 citations
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May 2022 in “Frontiers in Cell and Developmental Biology” Hair growth and health are influenced by factors like age, environment, and nutrition, and are controlled by various molecular pathways. Red light can promote hair growth, and understanding these processes can help treat hair-related diseases.
21 citations
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May 2016 in “Experimental and Therapeutic Medicine” MMP-2 and MMP-9 help hair grow, while their inhibitors peak when hair growth slows.
April 2016 in “Journal of Investigative Dermatology” Wnt ligands, produced by dermal papilla cells, are essential for adult hair growth and regeneration.
158 citations
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February 2012 in “Journal of Investigative Dermatology” FGF18 helps keep hair in its resting phase, affecting hair growth cycles.
95 citations
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July 2006 in “British Journal of Dermatology” Vitamin D receptors in hair follicles change with the hair cycle, affecting hair growth.