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L-Arginine is an amino acid. It is obtained from diet as well as supplementation and is essential for the body to form proteins. L-arginine is a precursor of a chemical called nitric oxide. Nitric oxide causes blood vessels to open wider (vasodilation) and enable greater blood flow to the muscles. This way, it is responsible for improving exercise efficiency and tolerance, along with improvement in vasodilation. Thus, it is a popular supplement, ideal for physically active individuals to increase sports performance and delay fatigue by eliminating lactic acid produced during workout. Fast&Up L-Arginine 1500mg is a pre-workout sports nutrition supplement, consisting of 1500mg of high-quality and pure L-Arginine. It is specifically designed to help improve stamina and performance by boosting the levels of nitric oxide in the body which helps promote oxygen and nutrients supply to the muscles by dilating the blood vessels. It helps maximize workout by delaying fatigue, and helping in protein transportation to the muscles with improved blood circulation.