“For some, it can create irritation, or inflammation of the hair follicles,” Gohara says. “Most of the time, the scalp is un-fazed by dry shampoo, but when irritation does set in, it’s not fun.” So how much is too much? Gohara and Jones both recommend using dry shampoo no more than two days in a row. “My general rule of thumb is two times a week max for any leave-in product that doesn’t involve washing the hair, unless it’s a hydrating oil,” Gohara says. Here are a few other tips on the healthiest way to use dry shampoo.
