Use B. Confident Blemish Serum, a fast-acting daily serum to target problem and blemish prone skin. Visible results for up to 8 hours – Clinically proven to reduce skin oil after 1 hour and to mattify skin for up to 8 hours. Helps prevent the appearance of imperfections with high level of Niacinamide which is proven to calm redness and blemishes. Long-term effect that works over time to gradually help reduce oiliness and prevent future breakouts.