Final answer:
Amino acids are essential in a patient's diet because they are required for the synthesis of protein, which is important for building and repairing cells and fighting infection.
Step-by-step explanation:
Amino acids are required for the synthesis of protein, which is an essential process for the body as proteins are necessary for building and repairing cells, fighting infection, and performing other critical functions. While the body can synthesize most amino acids, there are nine essential amino acids that cannot be synthesized and must be obtained from the diet. These essential amino acids are important for overall health and well-being.