What Are the 8 Essential Amino Acids and What Are Their Benefits? Definition of Essential Amino Acids Essential Amino Acids (also known as Indispensible Amino Acids) are amino acids that cannot be synthesized by the body, and thus must be supplied by diet.   Essential Amino Acids, while required by the human body to support life, are not called “essential”  because they are more important than other amino acids, but instead because they cannot be produced by the body

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Essential Amino Acids | Fitness, Health & Exercise Glossary