Peer Reviewed

Young girl drinking milk

Lysine is an amino acid and building block for all proteins. In children it is essential for skeletal (bone) development, and helps people of all ages to absorb calcium. Lysine also benefits the production of enzymes, hormones, antibodies, and collagen.

When vitamin C is combined with lysine, the formation of collagen is enhanced. Collagen is important to the formation and repair of bone and tissue. Lysine is not produced by the body and therefore must be absorbed from food intake and/or supplements.

  • When combined with vitamin C with bioflavonoids it may be helpful in combating cold sores (herpes simplex) and herpes zoster viruses.
  • Lysine may be helpful in people recovering from surgery and sports injuries, and may help to lower high serum triglyceride levels.

Some of the symptoms of lysine deficiency include

  • Anemia
  • Difficulty concentrating
  • Poor appetite
  • Weight loss
  • Hair loss
  • Fatigue
  • Emotional disturbances such as irritability

Sources of Lysine
Food sources include cheese (Parmesan), fish (dried and salted cod), milk, potatoes, torula yeast, and red meat. Sources of lysine also include soy-based products, including tofu, low-fat soybean flour, and soybean protein concentrates. The soy-based products are especially beneficial to vegetarians, who may find it difficult to enrich their diets with lysine.

Lysine is also available as L-lysine acetylsalicylate (LAS), Lysine clonixinate (LC), and L-lysine monohydrochlorine (LMH).

Guidelines and Cautions
The recommended dietary allowances (RDA) are:
RecommendationsPrior to taking a lysine supplement, determine how much the diet provides.

  • If cardiovascular disease is present, speak to a medical professional prior to taking lysine.
  • Lysine may cause cholesterol and triglyceride levels in the blood to rise.


Disclaimer: Many people report feeling improvement in their condition and/or general well-being taking dietary, vitamin, mineral, and/or herbal supplements. The Editorial Board of, however, cannot endorse such products since most lack peer-reviewed scientific validation of their claims. In most cases an appropriate diet and a "multiple vitamin" will provide the necessary dietary supplements for most individuals. Prior to taking additional dietary, vitamin, mineral, and/or herbal supplements it is recommended that patients consult with their personal physician to discuss their specific supplement requirements.

Updated on: 03/16/16
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Lipase (Pancreatic Lipase)
Vincent Traynelis, MD
Although many patient's describe improvement in their condition after taking one of the supplements previously described, the Editorial Board is unable to endorse these supplements, as there is insufficient peer reviewed research available. Hopefully the role of these compounds will be better understood once more scientific research is compiled.
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Lipase (Pancreatic Lipase)

Pancreatic lipase may be beneficial in treating autoimmune disorders such as rheumatoid arthritis and some food allergies.
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