Face your true strength with One Science Nutrition (OSN) Citrulline, a European-engineered performance catalyst designed to amplify endurance, focus, and muscle pumps.

Each serving delivers 2 g of pure Citrulline Malate (2:1), boosting nitric oxide production, enhancing blood flow, and powering every rep with clean, sustained energy. Taking L-Citrulline helps increase plasma levels of ornithine and arginine, improving nitric oxide metabolism and ammonia recycling.