Control excess oil and odor with this daily pH-optimized leave-on scalp serum, designed to extend time between washes. This serum balances pH to prevent excess sebum and stabilizes the scalp so it's less oily over time. * 2.2 fl oz/65mL * Cruelty-free, vegan, & organic * Paraben-free, gluten-free, & sulfate-free * Best for oily scalps & all hair types **Key Ingredients:** * Niacinamide (4%): Topical vitamin B3 that balances oil levels. * Hyper-Fermented Green Tea Blend (5%): Molecular antioxidant that reduces oil production by 60% in 8 weeks. * u200bu200bBio-Fermented Astragalus (2%): Anti-inflammatory properties to reduce irritation + promote hair follicle development. **How To Use:** Apply on wash day to control oil production and extend the time between washes. Continue using daily or between washes for optimal results. Gently massage into the scalp and leave it on. The lightweight formula absorbs quickly. | Act + Acre 4% Niacinamide Oily Scalp Serum at Free People