Overview

Lysine is an essential amino acid. The human body cannot make lysine, so it must be eaten in the diet. Sources include meat, fish, dairy, and eggs.

Lysine is a building block for making proteins in the body. It might also prevent the herpes virus from growing.

People use lysine for cold sores, canker sores, athletic performance, diabetes, and many other conditions, but there is no good scientific evidence to support most of these uses.

Uses & Effectiveness ?

Possibly Effective for

  • Cold sores (herpes labialis). Taking lysine by mouth might help prevent and heal cold sores. It's not clear if applying it to the skin helps.
There is interest in using lysine for a number of other purposes, but there isn't enough reliable information to say whether it might be helpful.

Side Effects

When taken by mouth: Lysine is possibly safe for most people when taken in doses up to 3000 mg daily for up to one year. It can cause side effects such as stomach pain and diarrhea.

When applied to the skin: Lysine is possibly safe for most people when used short-term.

Special Precautions and Warnings

When taken by mouth: Lysine is possibly safe for most people when taken in doses up to 3000 mg daily for up to one year. It can cause side effects such as stomach pain and diarrhea.

When applied to the skin: Lysine is possibly safe for most people when used short-term.
Pregnancy and breast-feeding: There isn't enough reliable information to know if lysine is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.

Lysinuric protein intolerance: Lysine supplementation might cause diarrhea and stomachcramps in children who have this rare genetic disorder.

Interactions ?

    Minor Interaction

    Be watchful with this combination

  • Gastrointestinal agents (5-HT4 agonist) interacts with LYSINE

    Lysine might reduce the effects of some gastrointestinal drugs called 5-HT4 agonists.

Dosing

Lysine has most often been used by adults in doses up to 3 grams daily for up to 1 year. It's also available in different topical products such as creams. Speak with a healthcare provider to find out what type of product and dose might be best for a specific condition.
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CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
© Therapeutic Research Faculty 2020.