Vitamins are also known as vitamins, and the types of vitamins include Vitamin C, Vitamin A, Vitamin D, etc. Different types of vitamins have different effects and functions, examples are as follows. 1. Vitamin C: Vitamin C can promote wound healing, promote the metabolism of amino acids and cholesterol, and play a role in preventing scurvy and cardiovascular disease. Vitamin C can also improve melanin deposition. 2. Vitamin A: Vitamin A, also known as retinol, can improve vision and relieve dry eyes. Vitamin A can also promote the synthesis of immunoglobulin, which can enhance the body’s immunity and have a certain protective effect on the body’s epithelial cells. 3. Vitamin D: Vitamin D can promote the absorption of calcium and phosphorus, promote bone development and prevent rickets. If the lack of certain vitamins and lead to disease, such as rickets, scurvy, etc., you can follow the doctor’s instructions to take vitamin drugs for treatment, the patient can not buy their own medicine, medication.