Lysine

Lysine

Lysine
Lysine is an essential amino acid that is found in foods such as yogurt, cheese, meats and beans. It is available as a dietary supplement that is used to treat some metabolic disorders. Learn more about lysine from our experts.

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    A , Pharmacy, answered
    L-lysine is an essential amino acid that is needed for protein synthesis. It increases the body's ability to absorb and retain calcium, and so may have value in the treatment of osteoporosis. It also may have value in the treatment of herpes, in which it is thought to reduce the availability to the virus of the amino acid arginine, and hence inhibit replication of the virus.

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    A , Pharmacy, answered
    Since lysine has not been approved by the US Food and Drug Administration (FDA) to treat any condition, there is little information about its safety, efficacy or purity. In addition, there are not any manufacturing standards or regulations in place for supplements like this. There have been reports of supplement products being contaminated with toxic substances or metals. Always purchase herbal and health supplements from reputable and reliable sources to minimize risks. Take supplements only as directed on the label or as directed by your doctor, pharmacist, nutritionist or healthcare provider.

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    A , Pharmacy, answered
    L-lysine does appear to help control herpes cold sore outbreaks. Cold sores are caused by the herpes simplex virus type 1, or HSV-1, which affects about 8 out of every 10 people. L-lysine appears to block the action of an amino acid that HSV-1 needs to grow and divide.

    L-lysine, or lysine, is an essential amino acid, which means that your body needs it but can't produce it, so you need to consume lysine in food or supplements. The best dietary sources of lysine are protein-rich foods such as meat, fish, cheese, nuts, eggs and soybeans. When taken as a supplement, lysine has been shown to significantly cut down on the frequency of herpes cold sores. Talk to your doctor for more information about lysine supplements.
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    A , Pharmacy, answered
    When taking lysine, be careful not to take too much. Excessive doses may cause diarrhea and abdominal pain. In animal studies, high levels of lysine have been shown to cause gallstones and high cholesterol. If you take other medicines and supplements, be aware of the potential for side effects and interactions. Also, if you take arginine, be aware that high doses of that supplement may lower the levels of lysine in your body.

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    A , Pharmacy, answered
    It is a good idea to consult a doctor before taking LLysine. The supplement can be harmful for some people with certain types of illnesses or in excessive dose. LLysine may not be recommended to women who are pregnant, expect to become pregnant, or are breast-feeding an infant. LLysine also can interact with some other medications and supplements and may not be the best treatment for a given medical condition.
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    Based on information from iGuard.org, a free medication monitoring service, 3% of patients experience side effects while taking Lysine. One  of the side effects reported by iGuard members includes diarrhea. Please follow up with your doctor or other healthcare provider if you are experiencing any symptoms that worsen or do not go away.
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    A , Pharmacy, answered
    Some studies have found lysine to be helpful in treating or preventing the outbreak of herpes infections, canker sores or cold sores. However, not all studies have been conclusive. Additionally, studies have found that lysine may help the body absorb calcium better and decrease the loss of calcium through urine. Calcium is essential for bone health, so some people think lysine aids in preventing osteoporosis. Some studies suggest that lysine combined with L-arginine (another amino acid) may improve the body's bone building capacity.

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    A , Pharmacy, answered
    If you are taking lysine, follow your doctor's instructions or the directions on the package label regarding maximum daily dose. Since the US Food and Drug Administration (FDA) has not approved lysine to treat any condition, the maximum daily dose has not been described.  

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    A , Pharmacy, answered
    L-lysine is usually not recommended for infants or toddlers. Most other children will receive adequate amounts of the amino acid in their diets and so not require a supplement. The children who may benefit from L-lysine usually should be given only a reduced dose and after consultation with a doctor.

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    A , Pharmacy, answered
    Lysine is an amino acid, one of the basic building blocks of protein, and like all amino acids, it serves many vital functions in the body. Amino acids help your body to grow and develop, repair injured tissue and derive energy from food. Lysine is also thought to help your body absorb calcium, strengthening bones. It is also important in the formation of collagen, a substance that helps strengthen tendons, cartilage, skin and bones. Lysine also may help you fight off certain illnesses. For example, some studies show it may help prevent outbreaks of cold sores and genital herpes in people who have the herpes simplex virus.

    Your body can't make lysine, one of nine "essential" amino acids, so you need to consume it in foods such as meat, fish, eggs, beans and nuts, or take it in supplements. 
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