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Vitamins are organic compounds that you must have to maintain normal body functions. They are usually available in the foods that you eat. You need them  for growth, health, and reproduction.
 

Minerals are sources of elements that also are necessary for the maintenance of normal body functions. Enzymes need minerals to perform their functions and to aid reactions that take place in the body. Just as vitamins, minerals occur naturally in foods and are essential to many basic tasks the body must perform. Minerals are especially important in bone structure and growth. Some of the major elements that occur naturally in foods are calcium, iron, phosphorus, magnesium, potassium, and sodium. In nutritional supplements, minerals are not available as single elements, but rather are available as compounds; for example, calcium may be presented as calcium carbonate and iron may be presented as ferrous sulfate.

Amino Acids are organic compounds that combine to form proteins.
When proteins are digested, amino acids are left. They are classified as either "essential" amino acids (which must be consumed in the diet), or "nonessential" amino acids (which can be made by the body from the essential amino acids).