Niacinamide, also known as B3, has been found to reduce sun damage and protect your skin from ultraviolet rays. If you have already had actinic keratosis, or skin cancers, B3 has been found to help rebuild damaged skin cells. This is an amazing vitamin for the skin! Take one tablet morning and night and watch your pigmentation lighten and your skin begin to glow…and watch for a reduction in the skin cancers!