NutraBio L-Citrulline

NutraBio L-Citrulline delivers 3 grams of pure fermented L-Citrulline per serving, a non-essential amino acid that supports nitric oxide production and healthy blood flow throughout the body.

Nitric oxide signals the smooth muscle lining the blood vessels to relax, widening the vessel and increasing the volume of blood moving through it. That improved circulation supports cardiovascular function and steady energy day-to-day and delivers more oxygen and nutrients to working muscles during training, which supports endurance, fuller pumps, and faster recovery between sessions.

L-Citrulline increases nitric oxide levels more effectively than direct L-Arginine supplementation. Arginine is largely metabolized in the gut and liver before reaching systemic circulation, whereas L-Citrulline passes through intact and is converted to arginine in the kidneys, producing a stronger response at a comparable dose.