L-Lysine is an essential amino acid. We need it, but we can’t synthesize it on our own. That’s why eating a diet rich in L-Lysine is recommended, but when that’s not possible, lysine supplements can be an ideal nutritional replacement.
Dietary Sources:
Foods rich in protein are good sources of lysine. That includes meat (specifically red meat, pork, and poultry), cheese (particularly parmesan), certain fish (such as cod and sardines), nuts, eggs, soybeans (particularly tofu, isolated soy protein, and defatted soybean flour), spirulina, and fenugreek seed. Brewer's yeast, beans and other legumes, and dairy products also contain lysine.
Lysine is available in tablets, capsules, creams, and liquids, and is usually sold in the L-lysine form.