Amino acids are drugs or supplements that can be taken orally or by injection when the body is deficient in essential amino acids, such as those who are unable to eat, or those with chronic wasting diseases. Normal people do not need to take amino acid preparations orally, but their daily diet can supplement the body’s needs and synthesize essential amino acid components. Distributors often exaggerate the effects, saying that it has a variety of effects such as strengthening resistance, improving physical fitness, calming the mind, delaying aging, etc. These are exaggerated efficacy. Amino acids are not useful for normal people and are a waste of money. The price of amino acids varies according to the specifications, preparations and manufacturers, and is generally between a few tens and hundreds of dollars.