One of the main ways Nitric Boost Ultra works is through amino acids like L-arginine and L-citrulline, which are commonly included in nitric oxide–boosting formulas. These amino acids convert into nitric oxide inside the body through metabolic processes. L-arginine directly transforms into nitric oxide, while L-citrulline converts into L-arginine first, making the effect more sustaine... https://www.youtube.com/watch?v=JnI7fRqLTeI