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
    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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    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
    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
    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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    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
    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
    Fainting and feeling hot are not listed among the side effects of L-lysine supplements. When taken in high doses, however, L-lysine supplements may cause gastrointestinal problems including nausea, stomach cramps and diarrhea and may increase your risk for gallstones and kidney problems. If you have liver or kidney problems, don’t take L-lysine without talking to your doctor. 

    L-lysine supplements are sometimes recommended for people who don't consume enough of the amino acid lysine in their diets. Lysine is found in a number of foods, including meat, fish, eggs, beans, and nuts. Consult your doctor before taking L-lysine or any other dietary supplement.
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    A , Pharmacy, answered
    Talk to your doctor about whether L-lysine supplements or the drug called Valtrex is better for you. Both therapies may reduce the severity and the number of outbreaks of cold sores caused by the herpes simplex virus type 1 -- but both may also cause side effects.

    The more common side effects of Valtrex (valacyclovir hydrochloride) include headache, nausea, stomach pain, vomiting and dizziness. Less common side effects may include kidney failure, nervous system problems, painful menstrual periods, joint pain and depression. Lysine supplements may raise blood levels of cholesterol and triglycerides, so they may not be recommended for people with heart disease or high cholesterol or triglycerides.

    Your doctor can help determine the best way for you to treat herpes cold sores while minimizing side effects.
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    A , Pharmacy, answered
    Since the US Food and Drug Administration (FDA) has not approved lysine to treat any condition, it should not be used to treat any disease. Manufacturing standards for such supplements are not regulated, so the use of any lysine supplement may have risks. Because of the possibility of side effects and interactions with other drugs and supplements, lysine should be used only when supervised by a knowledgeable healthcare provider. Anyone with liver or kidney disease should talk to their doctor before taking lysine supplements. Pregnant or breastfeeding women should talk to their doctor before taking lysine supplements because the effects on the developing fetus or nursing infant are not known.