PURE ENCAPSULS Essential Amino Acid Capsules - For intense muscle exertion, especially for athletes There are 20 amino acids that are important for the human organism, but the body cannot produce them all itself. Athletes often have an increased need for nutrients, especially amino acids. Pure Encapsulations Essential Aminos contains a balanced combination of essential amino acids and is based on high-quality, nature-identical pure substances. Lactose-free, gluten-free, fructose-free. No artificial colors or flavors.