If you think you can get away with a few days between washes, that likely comes down to hair texture. Those with fine hair generally need to shampoo daily, but coarser textures or women with longer hair can stretch it a little bit. If you are a dry-shampoo fan, try to use a formula that contains ingredients beneficial to the scalp. Philip Kingsley's One More Day dry shampoo contains zinc to fight flakes and bisabolol to soothe irritated skin. But if you're worried about how oily your hair is, don't only look at what's in your shower. "Hormonal imbalances and poor nutrition are much more likely to influence oil production than shampoo," said Cunnane Phillips. When in doubt, wash it out — daily.
