Short answer: L-Citrulline HCl converts back into L-Arginine in the kidneys, creating what the brand describes as a continuous cycle of nitric oxide production.
Why this two-step conversion process matters
Rather than L-Citrulline acting directly, it first converts to L-Arginine via the kidneys, then that arginine converts to nitric oxide — a specific, multi-step biological pathway worth understanding.
Why this creates a genuinely "continuous cycle," as the brand describes it
With both direct L-Arginine and L-Citrulline (which regenerates more arginine) in the formula, the combination is designed to sustain nitric oxide production longer than either ingredient alone.
💡 Worth knowing: L-Citrulline HCl is dosed at 100mg, with a second form — L-Citrulline Malate — also included at 100mg.