Quinoa
Quinoa is a high-protein food made from the dried fruits and seeds of the plant. Vegans who do not mind consuming a lot of arginine with their lysine may like quinoa. Quinoa contains more arginine than lysine, but the lysine content is still good. One cup of quinoa contains around 442 milligrams [11] of lysine when cooked.
Seitan
If you have celiac disease or nonceliac gluten intolerance, you should avoid seitan. Seitan is wheat gluten, which means it will cause very uncomfortable symptoms for you if you are allergic to it. Otherwise, it is a good source of lysine. There are around 656 milligrams [12] of lysine in three ounces of seitan.