Infused with niacinamide, antioxidants, and anti-inflammatory ingredients, this Act + Acre hair serum supports a balanced scalp, helping to manage oiliness and extend the time between washes. Infused with niacinamide, antioxidants, and anti-inflammatory ingredients, this Act + Acre hair serum supports a balanced scalp, helping to manage oiliness and extend the time between washes. Founded by celebrity hair stylist Helen Reavy, Act + Acre is rooted in the belief that great hair starts at the scalp. Creating and patenting the Cold Processed® method, the result is a nutrient-rich formula that leads to stronger, more resilient hair health.