Most ingredients in hair loss shampoos lack strong evidence of effectiveness.
April 2023 in “Journal of Investigative Dermatology” ALRN-6924 can protect hair follicles from chemotherapy damage by temporarily stopping cell division.
July 2023 in “Nature Reviews Chemistry” A new method strengthens hair without using harmful chemicals.
Higher iodine levels in children's hair may help cure tinea capitis during puberty.
July 2023 in “Cosmoderma” 
September 2023 in “Journal of The American Academy of Dermatology” Baricitinib treatment can help regrow scalp hair and eyebrows or eyelashes in people with severe alopecia areata.
April 2026 in “Journal of Ethnopharmacology” 1 citations
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January 2025 in “Journal of Cosmetic Dermatology” Maintaining a balanced scalp microbiome can help reduce itchiness.
Long bean leaf juice significantly promotes hair growth.
33 citations
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April 2020 in “Dermatitis” Hair care products often cause contact dermatitis, especially in women and hairdressers.