Niacinamide, also known as vitamin B3, has the functions of whitening and lightening spots, brightening skin tone, anti-aging, moisturizing, repairing barriers, etc. Niacinamide can inhibit the shedding of melanin keratinocytes, reduce skin dullness, brighten skin tone, and achieve whitening effect. It can also accelerate cell metabolism, and at the same time contribute to the synthesis of collagen and keratin, to achieve the purpose of anti-aging. Niacinamide maintains the skin's moisture, repairs the skin's barrier, and reduces moisture loss. Niacinamide also has the effect of controlling oil and shrinking pores for oily skin.