L-lysine is an essential amino acid — meaning the body cannot produce it and must obtain it through diet or supplementation.

BIOGENA's L-Lysine 500 delivers 500 mg of high-purity (>99.5%) L-lysine per capsule, sourced entirely GMO-free through the fermentation of maize and manufactured in-house at BIOGENA's Salzburg facility under strict quality and purity standards.

As a building block for protein synthesis throughout the body, L-lysine plays a particularly important structural role in collagen formation.

It's involved in the cross-linking of collagen fibers (via its role as a precursor to hydroxylysine), which contributes to the strength, elasticity, and integrity of skin, bones, cartilage, and connective tissue.

L-lysine also supports calcium absorption in the gut while reducing urinary calcium loss, making it relevant to long-term bone health.

Because L-lysine shares a cellular transport system with the amino acid L-arginine — a nutrient that herpes viruses rely on to replicate — a good baseline supply of L-lysine is commonly used to support the body's natural defenses against cold sores and fever blisters, and to support faster recovery when outbreaks occur.

This product is 100% vegan, gluten-free, lactose-free, and produced according to BIOGENA's "pure substance principle" — free from artificial colors, flavors, titanium dioxide, GMOs, nanoparticles, and magnesium stearate. Every batch is independently tested by the German LEFO Institute, and production is certified according to FSSC 22000.