13 citations
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January 2007 in “International journal of pharmaceutics” Papain cream removes hair better than papain gel, causing hair follicles to widen and skin to thicken.
13 citations
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January 1953 in “Archives of Dermatology” Certain unsaturated compounds can cause temporary hair loss by affecting hair structure.
385 citations
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November 1990 in “Journal of Cell Science” Human hair follicles can grow in a lab setting.
13 citations
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December 1991 in “Annals of the New York Academy of Sciences” Researchers created a lab model to study human hair growth, showing it can grow and self-regulate outside the body.
2 citations
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September 1980 in “Experientia” Polyethylene alanine caused hair loss in young lab animals but not in adults, with hair regrowth occurring within 20 days.