Benefits of L-Lysine

L-Lysine Side Effects

Foods High in Lysine

The twenty basic amino acids

Before we delve into the benefits of L-Lysine, side effects of lysine, and foods high in lysine, let's briefly discuss what it is and why it's needed for vibrant health.

Lysine is an essential amino acid, which means the body does not manufacture it and, as such, it must be obtained from food sources.

Lysine is a necessary building block for proteins. It's essential for proper growth and development in children; it helps calcium absorption and it maintains proper normal nitrogen balance in adults. It is also needed for tissue repair, and the production of antibodies, hormones, and enzymes.

Benefits of L-Lysine - How can it Benefit You?

  • It appears to be very helpful for herpes simplex virus infections, including cold sores and genital herpes –both reducing the number of outbreaks and alleviating the severity of the symptoms.
  • Helps in collagen formation
  • Helps build muscle protein so it may be useful for those recovering from surgery and sports injuries
  • Being investigated for the prevention and treatment of osteoporosis
  • Promotes general health and well being

    Foods High in Lysine

    Food sources of lysine include cheese, eggs, fish, lima beans, milk, potatoes, red meat, soy products, and yeast.

    Deficiencies, Precautions, and Side Effects of L-Lysine

    Deficiencies in lysine can result to anemia, bloodshot eyes, hair loss, nausea, dizziness, enzyme disorders, tiredness, poor appetite, retarded growth, weight loss, reproductive disorders, and an inability to concentrate.

    There have been no known side effects of lysine when taken at recommended dosages. On the other hand, possible side effects of taking too much of this amino acid may increase the risk of developing gallstones. Also, taking high doses of lysine for long periods of time may deplete levels of the amino acid arginine.

    Pregnant and nursing women, along with anyone who has an existing medical condition, including those on prescription medications should consult with their physician before beginning any type of dietary supplementation.

    Older individuals, particularly men, require more of this amino acid than younger ones.

    It is not recommended that lysine supplements be taken without consulting a physician first if you have a severe liver or kidney condition.

    Individuals with cardiovascular disease and those with elevated cholesterol and/or triglyceride levels should consult a physician before taking lysine supplements.


    The suggested dosage for herpes is 3-6 g daily – plus lysine rich foods. For cold sores or fever blisters, 500-1,000 mg daily between meals is recommended as a good preventive.

    Currently, there is no RDA (Recommended Dietary Allowance) for lysine. However, estimates are ages 13 and older: 12 mg per kilogram of body weight per day.

    Tips on Choosing Supplements

    Dietary supplements are not strictly regulated in the U.S. and, as such, manufacturers do not have to guarantee the safety, effectiveness, or even the true content of their products.

    Although supplements should be labeled properly, many aren't, so what's stated on the label may not be in the container. The potency or purity may be inconsistent or misrepresented. Some products tested also contained very harmful contaminates! In fact, consumers often only have a 1 in 5 chance of buying a product that actually contains the amount of ingredients stated on the label or one that is not contaminated.

    Therefore, it's crucial to only purchase L-Lysine supplements from pharmaceutical GMP compliant facilities, which adhere to the most exacting manufacturing standards.

    Featured Comprehensive Product

    One company that meets the above requirement -- and more -- is Xtend-Life Natural Products from New Zealand. Their flagship product called Total Balance (Premium Version) contains L-Lysine, in addition to a broad spectrum of nutrients that the body needs for optimum 'whole' body health, including vitamins, minerals, potent antioxidants, specialty nutrients, herbal extracts, enzymes, and other amino acids. In fact, Total Balance contains over 70 specialized nutrients.

    All of the ingredients are scientifically combined in a synergistic way to enhance and maximize the efficacy of each other.

    We here at Nutritional-Supplement-Educational-Centre have been taking Total Balance for several years now and can personally attest to its excellent results such as an increase in energy levels, mental clarity, and an increase feeling of well-being.

    To Your Health!

    The Editors

    Much more than L-Lysine can be found at our popular Amino Acid webpage
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