Aloe vera contains over 75 known active ingredients (and probably many more). Also included are 19 of the 20 amino acids required by the human body and 7 of the 8 essential amino acids (that the body cannot make), as well as vitamins and minerals. Aloe vera also contains useful enzymes like Amylase, Bradykinase, Catalase, Cellulase, Lipase, Oxidase, Alkaline Phosphatase, Proteolytiase, Creatine Phosphokinase, Carboxypeptidase. Aloe vera contains important minerals Like Calcium, Chromium, Copper, Iron, Magnesium, Manganese, Potassium, Phosphorous, Sodium and Zinc. Aloe vera contains useful vitamins which include A (beta-carotene and retinol), B1 (thiamine), B2 (riboflavin), B3 (niacin), B6 (pyridoxine), B12 (cyanocobalamin), C(ascorbic acid), E(tocopherol) and Folic Acid. Salicylic Acid, a substance similar to aspirin is also found in Aloe vera. It also contains Saponins and Sterols.