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L-Citrulline is absorbed more efficiently than taking L-Arginine directly, largely bypassing the first-pass liver metabolism that limits arginine's effectiveness as a standalone supplement.
Once absorbed, the body converts L-Citrulline into L-Arginine — the direct building block for nitric oxide.
Arginine is converted into nitric oxide, a signaling molecule that relaxes the smooth muscle in blood vessel walls.
Relaxed vessel walls support healthy circulation and blood pressure regulation — the endpoint this entire pathway is built around.
The citrulline-to-nitric-oxide pathway itself is well-established physiology, and Vitamin B3 (20mg, 125% DV) and Zinc (11mg, 100% DV) are published at genuinely nutritional amounts. What we can't verify is whether the undisclosed L-Citrulline amount — sharing a 570mg blend with five other ingredients — comes close to the roughly 3,000mg commonly used in circulatory research. The mechanism is real; whether this specific formula delivers enough of the key ingredient to meaningfully engage it is the part we can't confirm.
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