What are essential amino acids?

Essential amino acids are those that the body is unable to synthesize, meaning they cannot be produced internally in sufficient quantities to meet physiological needs. As a result, these amino acids must be obtained through dietary sources. This is crucial because essential amino acids play vital roles in processes such as protein synthesis, tissue repair, and the production of hormones and neurotransmitters.

In contrast, the concept of amino acids that the body can produce is related to non-essential amino acids, which are synthesized from other compounds or amino acids within the body. The notion that essential amino acids are exclusive to animal proteins is inaccurate, as many plant-based sources also contain them. Additionally, all essential amino acids are indeed necessary for protein synthesis, contradicting the idea that they are not necessary. Understanding the definition and importance of essential amino acids is key for nutrition and health, particularly for those following strict dietary patterns.