This study found that Polygonum multiflorum radix ethanol extract may promote melanin synthesis, potentially helping to turn gray hair back to black by enhancing antioxidant activity and increasing tyrosinase expression.
January 2024 in “Indian Journal of Pharmaceutical Sciences” In this laboratory study, researchers found that a methanol extract of peach kernel improved the growth and viability of human hair follicle dermal papilla cells, suggesting its potential efficacy for hair growth and care through cell proliferation and signaling pathways activation.