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Facts on L-Lysine

L-lysine is an amino acid found in foods like eggs, fish, beef and soy. Also called lys or 6-diaminohexanoic acid, L-lysine is sometimes taken in supplement form in alternative medicine.

  1. Function

    • Lysine performs a variety of functions, such as lowering cholesterol levels, helping your body absorb calcium, and producing cartilage and other tissues in your body, according to the University of Maryland Medical Center.

    Uses

    • In alternative medicine, L-lysine is used to treat a number of conditions, including improving endurance and athletic performance, preventing osteoporosis and treating kidney stones, cold sores and rheumatoid arthritis.

    Drug Interactions

    • Combining L-lysine with calcium supplements has the potential to cause excessive levels of calcium in your body, cautions RxList.com.

    Risks

    • Possible side effects of L-lysine include stomach pain and diarrhea. There is also a danger for kidney disorders developing from L-lysine, cautions the Physicians Desktop Reference.

    Considerations

    • Because its possible effects on infants are unknown, avoid taking L-lysine if you are pregnant or nursing. If you have a history of kidney or liver disease, it may not be safe for you to take L-lysine, reports the Physicians Desktop Reference.

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