What It Actually Is
L-Citrulline is a non-essential amino acid that the body converts into L-Arginine and then nitric oxide, a molecule that helps relax blood vessel walls.
What Research Generally Shows
L-Citrulline has a solid research base for supporting nitric oxide production and blood flow, and is generally considered more efficiently absorbed than direct L-Arginine supplementation.
The Honest Gap
Research commonly uses doses around 3,000mg — more than five times Vasoryn's entire 570mg blend, which is shared across six ingredients. We can't verify how much of that 570mg is actually L-Citrulline.
