Nutrition Tutorial

Problem 2: "Essential" Amino Acids and Vitamins

What is meant by the term "essential" when applied to amino acids and vitamins.

	Essential refers to the fact that we must have the amino acid for protein synthesis.
	Essential means that we must either synthesize the amino acid or take it in our diet for protein synthesis.
	Essential means that we cannot make the amino acid and obtain it through our diet.
	Essential means that we must synthesize the amino acid.