Testosterone and dihydrotestosterone can slow down the growth of certain hair follicle cells.
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May 1999 in “Archives of Dermatological Research” Basal cell carcinoma may start from parts of tiny hair follicles.
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May 2002 in “Journal of Investigative Dermatology” A new keratin, hK6irs1, is found in all layers of the hair follicle's inner root sheath.
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December 1969 in “The Lancet” Children with marasmus have more resting hair follicles and thinner, less pigmented hair, showing long-term malnutrition.