Every 1-2 days to prevent the buildup of dirt.
Every 5-7 days retain some of the hair’s natural oils.
Every 2 days to provide enough moisture and body to the hair.
Every 4-5 days depending on the density of the hair.
Shampoo less often if you have a dry scalp that produces less sebum, and more often if you have a very oily scalp.
Shampoo more often if you exercise frequently or if you live in a humid climate. To shampoo, your hair correctly, use room temperature water, a small amount of shampoo, and massage it gently on your scalp.