Niacinamide Face is a form of vitamin B3 that has been shown to be beneficial for skin. It helps to improve the appearance of skin by helping to reduce inflammation, redness, and acne.
To use niacinamide as a serum, you should take 1-2 drops per day. You can also apply it directly to the skin using a dropper or applicator. Make sure to wait until it fully absorbs before applying other products.