Vitamin C is a water-soluble vitamin, and it is best to eat it on an empty stomach, so choose to take it half an hour before meals in the morning. Vitamin E is a fat-soluble vitamin, which is usually taken half an hour after meals.

You can't eat more, just once a day, and don't eat both because the absorption effect is poor. Eating more fresh fruits and vegetables and drinking more water will help improve your skin.