What is the difference between an amino acid and a protein?
How does this difference in structure affect biological function?
Proteins are polymers of amino acids.
Your body needs 9 essential amino acids from the diet while the other amino acids (the nonessential amino acids) usually can be made by the body. Essential amino acid - Wikipedia, the free encyclopedia
Amino Acids and Protein
Would I be putting a grain-feed cow on a fad diet if I took it out of the feedlot and put it on pasture eating the grass nature intended?