What are essential amino acids?

Essential amino acids are those that the body cannot synthesize on its own and therefore must be obtained through the diet. There are nine essential amino acids that humans must consume in sufficient quantities to support various bodily functions, including the synthesis of proteins, hormone production, and other metabolic processes.

These amino acids play a critical role in muscle repair, growth, and overall health. Since the body is unable to manufacture them, a deficiency in any of the essential amino acids can lead to various health issues, such as impaired immune function, muscle wasting, and slowed recovery from illness or exercise.

The other options describe amino acids in ways that do not align with the definition of essential amino acids. For instance, amino acids that can be synthesized by the body are known as non-essential amino acids, while those produced during digestion are not classified as essential or non-essential, but rather as the products of protein metabolism. Lastly, amino acids not required for human health would not fit the criteria for essential amino acids, as these are vital for optimal physiological functioning.