Let’s throw a caveat into the mix: witch hazel for your hair. Can those who renounced the active for good possibly seek its benefits in hair care? Allow us to investigate. To begin, here are five purported benefits of using witch hazel on your hair and scalp: Those with super-sensitive skin might also want to steer clear. “[Witch hazel] has a slightly acidic pH, which can be irritating, and it’s important not to irritate sensitive skin too much,” Nazarian explains. You can dilute the witch hazel with water before you apply, which can potentially reduce the effects; just know your limits here, and be sure to do a patch test before swiping witch hazel on your full scalp.