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Steadfast Nutrition’s L-Arginine supplement provides 500 mg of L-Arginine, which improves athletic performance by relaxing blood vessels, promotes heart health, boosts immunity, and helps recover from an illness. Athletes, in particular, opt for L-Arginine because it produces nitric acid, which increases nutrient supply to muscles, and supports creatine synthesis, enhancing exercise performance.L Arginine is an amino acid- a protein precursor. L-Arginine intake enhances athletic performance by increasing blood flow to the muscles, boosting performance capacity. L-Arginine helps synthesise creatine which strengthens muscles and helps them produce energy, improving stamina and sports performance. It’s a semi-essential or conditionally essential amino acid, meaning our body cannot synthesise it in conditions like illness or pregnancy.