Allergic Niacinamide: Symptoms, Causes, Treatment, and How to Know if You’re Truly Allergic If you’ve recently started using a niacinamide serum and your skin suddenly became red, itchy, tight, swollen, or started burning, your first thought is probably, “I think I’m allergic to niacinamide.” It’s an understandable conclusion. Niacinamide is the newest product in your routine, … Continue reading Allergic Niacinamide: Symptoms, Causes, Treatment, and How to Know if You’re Truly Allergic