Because less means more when it comes to One Thing Niacinamide 10% — a one ingredient toner that can be used in a multitude of ways. This single-ingredient toner can be used as a serum, added to a face mask, or even to your moisturizer. It contains 10% niacinamide, which helps to control excess sebum, minimize pores, improve skin texture, calm the skin, and even out skin tone. One Thing Niacinamide 10% is easy to use, and makes a great addition to any skincare routine. LTKOver40 LTKFindsUnder50 LTKBeauty