Target Endurance Formula is a caffeine-free nutritional supplement to support the physiological needs of the body during strenuous activity. Organic target minerals are chelated to specific amino acids, aiding absorption by the body. In this formula, copper and zinc are chelated to the amino acids arginine, leucine and glycine, which play roles in energy production. Copper and zinc are balanced for optimal use in the body. Zinc is stored in rather large amounts in the bones and muscles. It appears to be easily utilized and is important for many enzyme functions. Ingredients provide 100–300% of the Daily Value of vitamin B6 and vitamin B12. Also contains vitamin C, niacin, folic acid, pantothenic acid, calcium, phosphorus, iodine, zinc, copper, potassium, bee pollen, gotu kola aerial parts, eleuthero root, capsicum fruit, licorice root, ginger root, l-glutamine and choline.