There is no scientific evidence to prove that milk has whitening effect, but milk contains many nutrients that can provide energy and nutrition to the body, making the face rosy and shiny, thus can indirectly improve the skin’s radiance. Milk is rich in protein, vitamins and antioxidant substances. The vitamins, such as vitamin B6, vitamin A and vitamin D, can promote skin metabolism, while the whey in milk may have some eliminating effect on melanin, which can prevent pigmentation to some extent. The high protein content in milk can enhance the immunity of the body, regulate endocrine and avoid dull skin. Drinking hot milk before bedtime can increase the quality of sleep and make the skin rosier and fuller. Therefore, milk does not have a direct and fast whitening effect, but long-term consumption can brighten the skin tone and make it look healthier. In addition, you need to pay strict attention to sun protection in your daily life, and you can usually prevent pigmentation and darkening of the skin by applying sunscreen, holding a sun umbrella, and wearing a sun hat to isolate the ultraviolet radiation.