The Ordinary Niacinamide 10% & Zinc 1% Water Based Serum is a water based facial serum designed to combat blemish-prone skin and acne-related concerns. It is a universal serum that smooths, brightens and supports the skin. The formula contains 10% niacinamide and 1% zinc. Niacinamide is a form of vitamin B3 that helps reduce inflammation, regulate sebum production, and improve the appearance of blemishes and enlarged pores. Zinc calms the skin and helps reduce excess sebum secretion, making it beneficial for oily skin types. This lightweight serum boosts skin brightness, improves smoothness and reinforces the skin barrier over time. Clinical studies showed smoother skin after 8 weeks and improved hydration in as little as 7 days.