Lemon is a kind of nutritious fruit rich in vitamin C, which is commonly used as beauty food. Lemon is durable and easy to store, which can prevent gums from swelling and bleeding, reduce the probability of black spots and freckles, and has partial whitening effect. The whitening function of lemon can't be underestimated. Drinking lemonade often has a good whitening effect. Lemon peel is also rich in calcium, so in order to achieve the desired effect, it is best to squeeze juice from the peel to be the most nutritious.