Act+Acre 4% Niacinamide Oily Scalp Serum balances and clarifies. Designed as a daily leave-on treatment, the pH-optimized serum extends time between washes by targeting oil production at the source. Niacinamide helps to balance oil levels while a hyper-fermented green tea blend acts as a molecular antioxidant. Bio-fermented astragalus supports collagen and hyaluronic acid production to ensure a moisturized scalp.