The amino acid L-citrulline bound to malic acid is converted to L-arginine and L-ornithine in the kidneys. This amino acid combination is therefore more effective and sustainable in increasing arginine levels than the supplementation of L-arginine itself, which would only cause a brief increase in serum. Naturvit® L-arginine plus L-citrulline has a positive effect on blood circulation, nutrient supply and muscles. Naturvit® L-arginine plus L-citrulline is lactose-free, gluten-free, sugar-free and vegan. Ingredients: L-arginine, L-citrulline, coating agent: hydroxypropyl methylcellulose (capsule shell) Recommended dosage: Take 2 capsules daily with a meal.