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Amino acid, essential: An amino acid that cannot be made by humans and so is essential to the human diet. There are 9 essential amino acids: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
Any of eight of the 20 naturally occurring amino acids that are indispensable for optimum animal growth but cannot be formed in the body and must be supplied in the diet.
Essential amino acids Humans can produce 10 of the 20 amino acids. The others must be supplied in the food. Failure to obtain enough of even 1 of the 10 ...
Essential Amino Acids. Amino acids are organic compounds which contain both an amino group and a carboxyl group. According to Tillery, et al., the human body can synthesize ...
... be synthesized by an animal, or at a rate sufficient to meet its physiological needs, and which therefore must be obtained from the diet, are called essential amino acids.
Conditionally essential amino acids meaning they are not normally required in the diet but can become essential under special circumstances. Nonessential amino acids are ...