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      learn Caffeine

      • Does caffeine stimulate hair growth or only slow hair loss? Caffeine stimulates hair follicles in laboratory cultures, and one open-label, manufacturer-funded trial in 210 men found a 0.2% caffeine topical non-inferior to minoxidil 5% on an anagen-ratio endpoint. A 2025 systematic review found only a few small controlled trials, mostly rated low or very low quality, and none in alopecia areata.

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      herb and oil thought to stimulate skin and hair

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      Provitamin B5, a moisturiser in hair and skin products

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      Topical anti-androgen sold as a cosmetic lotion

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      Prostaglandin eye drop used for glaucoma and eyelash growth