Lysine is an essential amino acid, meaning your body cannot produce it and it must be obtained through your diet. This amino acid is vital for processes such as growth, tissue repair, and collagen formation. Protein-rich foods high in lysine include eggs, lentils, meat, dairy products, and fish.
Lysine is also available as a supplement, often labeled as “l-lysine.” Taking lysine supplements may offer several benefits, including preventing cold sores, improving muscle strength, and reducing anxiety.
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