Is 10% niacinamide too much? Shirazi says that higher concentrations of niacinamide—“particularly those at 10% or higher—“can potentially cause irritation such as redness and rebound oil production.” On that note, Dr. Green recommends that sensitive-skinned folks start with a lower concentration to avoid potential irritation and redness.
Can you apply too much niacinamide? You may experience some redness and irritation when you start using niacinamide products. Some of this may be normal and lessen over time, but lasting irritation may be a sign you’re using too much or a product with too high of a concentration of niacinamide for your skin type.
Is 12% niacinamide too high? What percentage of niacinamide should you be using? Most dermatologists and cosmetic chemists recommend staying within the 2–5% range. Neostrata’s Illuminating Serum, for instance, features 4% niacinamide, which will be well-tolerated by most skin types.
Can you use too much niacinamide on face? You’re more likely to irritate your skin with ultrahigh concentrations than anything else.” While the B vitamin is beloved for strengthening the skin barrier, too much of it can actually lead to sensitivity, skin irritation, and redness—but if you stick to a 2% to 5% concentration, you should be set.