April 2023 in “Journal of Investigative Dermatology” Blocking casein kinase 1 in skin cells can help melanocyte precursors move better, potentially helping with conditions like vitiligo or gray hair.
49 citations
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March 1996 in “Experimental Brain Research” 227 citations
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February 1989 in “The Journal of Comparative Neurology” CGRP-IR axons may help maintain and renew tissues.
5 citations
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August 2011 in “Biotechnology and Bioprocess Engineering” 
22 citations
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February 2017 in “Clinical and Experimental Dermatology” Icariin helps mouse hair grow by boosting a growth factor in skin cells.
The arrector pili muscle plays a key role in hair loss in androgenetic alopecia.
January 2003 in “Chinese Journal of Reparative and Reconstructive Surgery” Dermal papilla cells can help form hair follicles and produce hair.
6 citations
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October 2015 in “Experimental dermatology” Adenine helps delay aging in human hair follicle cells.
April 2023 in “Journal of Investigative Dermatology” IL-9/IL-9R signaling can negatively affect human hair growth and may be a target for treating hair loss conditions.
1 citations
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August 2023 in “Biomolecules & therapeutics” HAPLN1 can promote hair growth and may help treat hair loss.