L-Lysine is an essential amino acid that cannot be manufactured by the body and must be obtained from the diet. It is primarily noted for its importance in healthy protein synthesis, nitrogen balance and immune function.
Lysine is an amino acid (building block of protein).
Lysine is used for preventing and treating cold sores (caused by the virus called herpes simplex labialis). It is taken by mouth or applied directly to the skin for this use.
Lysine is also taken by mouth to improve athletic performance.
How does it work?
- Cold sores (herpes simplex labialis). Research suggests that lysine seems to reduce cold sores when taken by mouth and also when applied as a cream to the skin. However, some research suggests that it does not reduce the severity or recurrence of cold sores.
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