First of all, what are vitamins? They are substances which are necessary to life, and they are produced by various plants and animals. Everybody must have these vitamins in their diet regularly to enable the body cells to grow and repair themselves. Although scientists have long and complicated names for vitamins, we know them best by their simple letters, A, B, C, D, E, and so on, and each one performs a vital job. Vitamin A, for example, helps prevent infection, and Vitamin C presents scurvy, a distance which makes the body’s bones weak and the teeth loose. Vitamin D is especially important for growing children as it makes their bones strong. If we have a good balanced diet, the chances are that we are getting all the vitamins we need.