Q: What does dry shampoo actually do?
A: It absorbs oil at the roots and adds a little texture, so hair looks and feels freshly washed for another day. It is a refresh between washes rather than a replacement for washing.
Q: Does dry shampoo damage your hair?
A: Not the hair itself. The thing to watch is build-up on the scalp, which is why it works best as a between-washes refresh rather than day after day without washing.
Q: How often can you use dry shampoo?
A: A day or two between washes is comfortable for most people. Wash properly rather than stacking several days of product on the scalp.