Jan 23 2015 Essential Amino Acids Posted by Courtney The 9 Essential Amino Acids: 1. Histidine – Beef 2. Isoleucine – Egg whites 3. Lysine – Cheese 4. Methionine – Fish 5. Phenylalanine – Lamb 6. Threonine – Seaweed 7. Tryptophan – Tofu 8. Valine – Grains 9. Leucine – Elk