L-Lysine 500 provides 500 mg of high-purity, vegan L-lysine per capsule — an essential amino acid the body cannot produce on its own. It supports collagen formation, calcium absorption for bone health, immune function, and the body's natural resistance to cold sore outbreaks.

The standard recommendation is 1 capsule of L-Lysine 500 daily with a glass of water, ideally with a meal.

During periods of increased need — such as an active cold sore outbreak or intense physical training — some people take up to 2–3 capsules per day, but it's best to consult a healthcare provider before exceeding the standard dose.

Yes. L-Lysine 500 is 100% vegan and produced entirely GMO-free through the fermentation of maize.

It's also gluten-free, lactose-free, and free from artificial colors, flavors, titanium dioxide, and magnesium stearate, in line with BIOGENA's pure substance principle.

L-Lysine 500 supplies the amino acid L-lysine, which competes with arginine — a nutrient herpes-family viruses rely on to replicate — for the same cellular transporter.

A consistent daily supply of L-Lysine 500 is commonly used to support the body's natural defense against cold sore and fever blister outbreaks, and to support recovery when they occur.