Act Acre Oily Scalp System (Scalp Renew & Stem Cell Scalp Serum) works to balance the scalp and reduce itchiness caused by excess oil. The Weekly Scalp Renew Exfoliator combats excess oil and sebum while soothing the scalp. The Daily Scalp Serum which balances the scalp microbiome and hydrates the scalp to promote thicker, fuller looking hair.