Caffeine is a substance that raises alertness and boosts energy. Most adults can safely consume up to 400 milligrams of caffeine daily, equivalent to about four 8-ounce cups of brewed coffee. For ...

When applied topically, caffeine can support hair growth by encouraging a longer growth phase, delivering antioxidants, and boosting blood circulation. Though most people can use caffeine for hair ...

If you look for hair loss solutions, you’ll undoubtedly come across caffeine in shampoos and scalp tonics. These products are often marketed as preventing hair loss and promoting hair regrowth — but ...