Salmon
Salmon is a fish well known for containing healthy proteins and fats like omega-3 fatty acids. If you are trying to increase your lysine intake, you should consider adding salmon to your diet. This tasty fish is rich in lysine. Three ounces of cooked salmon will give you around 1,790 milligrams [3] of lysine.
Soy milk
If you are a strict vegan or prefer to get your lysine from alternative milk sources due to allergies, soy milk may be what you need. One cup of lysine contains around 439 milligrams of lysine [4]. The caveat is that soy milk contains more arginine than lysine. You may want to reconsider adding it to your diet if you need much more lysine than arginine in your diet.