A big beauty trend in healthy hair is to (supposedly) not wash your hair daily. The thought around that is so your hair's natural oils can soak into your hair to give it more shine and hydration. Although, your scalp has different oils than the rest of the body. When not washed often, you collect a build up of dead skin cells and excess oil. When that bacteria grows, it can cause dandruff, itchy scalp, hair flakes and possibly hair loss.
“Dry shampoos do absorb some of the oil, but they also sit on the scalp and allow the oil to stay there, and again the yeast and the bacteria to overgrow, so use those sparingly,” said Dr. Melissa Piliang, a dermatologist at the Cleveland Clinic.
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