High strength niacinamide serum from DR. ALTHEA formulated to brighten skin tone, refine pores and balance excess oil. DR. ALTHEA 15% Niacinamide Purity Serum is a high strength brightening serum formulated to improve skin tone, texture and overall clarity. This lightweight watery serum absorbs quickly to help regulate excess sebum while supporting a healthier skin barrier. With 15% niacinamide and supportive soothing ingredients, it helps minimise the look of pores and uneven pigmentation. Suitable for daily use, it delivers visible results without heaviness or stickiness.