Question

what is the difference between an essential and a nonessential amino acid?

Explanation:

Essential amino acids cannot be synthesized by the human body, so they must be obtained through dietary intake. Nonessential amino acids can be naturally produced by the human body, so they do not need to be consumed via food.

Answer:

Essential amino acids: Cannot be made by the body, must be obtained from diet.
Nonessential amino acids: Can be synthesized by the body, no dietary requirement.