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Can the natural supplement Lysine help manage or treat cold sores? Here are the facts:

What’s Lysine?

Lysine is an essential amino acid, which means your body needs it to function properly. Amino acids are the building blocks for protein, and lysine is important for proper growth. It helps the body absorb calcium, and plays an essential role in producing both carnitine—a nutrient that converts fatty acids into energy and helps lower cholesterol—and collagen in your body.1

Lysine from Nature 

Your body can’t manufacture lysine. The only way to get it is through your diet. One of the building blocks of protein, lysine is found in many foods, such as red meat, fish, and dairy products. If you eat a healthy diet, your body will get ample amounts of lysine.2

Lysine and Cold Sores

In the 1980s, before effective drugs for herpes were introduced, lysine was considered a potential treatment and supplement to manage the virus. Some studies suggest that taking lysine on a regular basis may help prevent outbreaks of cold sores while others show no improvement.2 To find out if lysine is right for you, consult your doctor.

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