March 1998 in “Journal of dermatological science” Protease Nexin-1 is found in human hair growth cells and is affected by male hormones.
27 citations
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September 1999 in “Journal of Investigative Dermatology” Human skin cells contain Protease Nexin-1, and male hormones can decrease its levels, potentially affecting hair growth.
May 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Aging causes changes in scalp cells that can negatively affect hair health.
September 2017 Older women's scalp cells show changes that could contribute to hair thinning.
146 citations
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May 2002 in “The American journal of pathology” Cathepsin L is essential for normal hair growth and development.