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Excessive washing can be harmful, because by washing you remove natural oils of the hair and they become dry. Imagine that you wash a cashmere sweater every day, ” hello fiber status”. More or less once or twice a week depending on hair type. And you have oily hair, it can be washed more often. Be careful here too, like liquid soaps, some shampoos contain allergenic preservatives. If you are allergic, read carefully the labels.
