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A concentrated 5% Niacinamide serum for oily skin made with only 10 ingredients that visibly reduces excess oil and shine. WHAT IT IS Kiehl's oil-minimizing Niacinamide Serum is formulated with only 10 ingredients to help reduce the appearance of excess oil and the look of redness. Concentrated with 5% Niacinamide, our potent formula helps to visibly minimize shine and soothe skin with moisture. - Formulated to help visibly minimize shine and soothe skin with moisture - Reduces the appearance of excess oil on skin - Visibly reduces the look of redness - Visibly reduces redness - Suitable for all skin types, including sensitive - Formulated without added fragrance and colorants WHAT IT’S GOOD FOR Our Niacinamide serum for oily skin visibly reduces surface oil and shine, and improves the look of smooth and even skin. - Instantly Reduces Excess Oil by 58%* - After 1 Week, 92% Agree Skin Feels Soothed** *Instrumental measurement in a 4-week clinical study. **Reported by consumers in a 4-week study. ***Expert grading in a 4-week clinical study. KEY INGREDIENTS Niacinamide Niacinamide, the form of Vitamin B3 used within our formulas, is known to help visibly brighten skin. When used in topical skincare formulas, Niacinamide can also help balance skin’s surface oil. See full list HOW TO USE Apply 2-3 drops of Niacinamide Serum to clean, dry skin in the morning and evening.