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      learn Osteopontin

      signaling protein that, when suppressed, may grow hair by reducing inflammation and stem cell loss

      learn Biotin

      supplement to help with hair texture and quality

      learn Microneedling

      technique to create small wounds in skin to activate collagen production and hair growth

      learn Peppermint

      • Which is more effective: peppermint essential oil or extract in shampoo? Neither form has been tested for hair loss in people. Peppermint essential oil is the only one with any experimental support — a single four-week mouse study in which 3% peppermint oil outperformed 3% minoxidil on follicle counts — while peppermint extract in shampoo is a low-concentration cosmetic ingredient with no hair-growth data.