How are nonessential amino acids produced?

Nonessential amino acids are produced by the body through various biochemical processes. Unlike essential amino acids, which must be obtained from the diet because the body cannot synthesize them, nonessential amino acids can be synthesized by the body using available substrates. This involves the conversion of other compounds, such as carbohydrates and certain amino acids, into nonessential amino acids through processes such as transamination and deamination.

This means the body has the capability to produce these amino acids as needed, allowing it to maintain protein synthesis and other metabolic functions without relying solely on dietary sources. The other options suggest methods of acquisition that do not apply to nonessential amino acids, making this the correct understanding of how these amino acids are generated within the body.