Final answer:
Non-essential amino acids, such as alanine and arginine, can be synthesized by the body and are not required in the diet, unlike essential amino acids, which must be obtained through food.
Step-by-step explanation:
The amino acids that do not need to be supplied in the diet are termed non-essential amino acids. These amino acids can be synthesized by the human body, which means they are not required to be included in the diet for the body to maintain proper function. Examples of non-essential amino acids include alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.
This is in contrast to essential amino acids, which cannot be synthesized by the body and thus must be obtained through one's diet. The nine essential amino acids are histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. Additionally, certain amino acids can become conditionally essential in specific situations, such as illness or stress, where the body may not be able to produce a sufficient amount and thus they need to be consumed in the diet.