Answer:
Amino acids can be broken down into two categories: essential and nonessential amino acids. Nonessential amino acids are already made by your body, so you will have them in your body even if you don’t get them from food. Essential amino acids are not made by your body. Because of this, you have to get your essential amino acids from food.
The nine essential amino acids are:
Histidine
Isoleucine
Leucine
Lysine
Methionine
Phenylalanine
Threonine
Tryptophan
Valine