Exercise can promote skin metabolism, promote blood circulation, help sweat, naturally help to expel toxins from the skin, and is more conducive to whitening. 1, two glasses of water in the morning and evening can whiten the skin. The method of whitening skin is simple. The first is to ensure the habit of drinking two glasses of water in the morning and evening. The water temperature should not be too high. In the morning, you can add some salt to the water to help remove it. ...