While L-Citrulline can be a helpful supplement, it's essential to understand its role and limitations: 1) Conversion Process: L-Citrulline is a precursor to L-Arginine, which in turn is needed for nitric oxide production. However, this conversion requires nitric oxide synthase, and if this enzyme isn't functioning effectively, simply increasing L-Arginine levels won't boost nitric oxide production. 2) Real Goal: The aim isn't just to increase L-Arginine but to enhance nitric oxide production, cr