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May 2002 in “The American journal of pathology” Cathepsin L is essential for normal hair growth and development.
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March 2021 in “Nature” Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.
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July 2020 in “Cell” Muscles and nerves that cause goosebumps also help control hair growth.
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January 2009 in “International journal of trichology” Hair grays due to oxidative stress and fewer functioning melanocytes.
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