December 1977 in “Archives of Dermatology” Most patients with small patches of hair loss usually regrow hair.
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September 2024 in “Plant Cell & Environment” Chitosan affects root hair growth and callose deposition based on its concentration.
September 2009 in “Hair transplant forum international”
July 2023 in “bioRxiv (Cold Spring Harbor Laboratory)” Chitosan slows root hair growth and causes a buildup of callose at low concentrations, but at high concentrations, it only inhibits growth without callose buildup.
June 1937 in “Science news-letter/Science news letter” Vitamin B can prevent hair from turning gray in rats.