Tested Nutrition Tested Arginine Capsules contain only L-Arginine. L-Arginine is an ingredient that is typically used for its nitric oxide benefits but also has many other benefits to the user. L-Arginine is required for protein synthesis and also increases blood flow. L-Arginine increases blood flow to the muscles during workouts, is a precursor for the vasodilator, and is required for the synthesis of most proteins. L-Arginine is a non-essential amino acid involved in protein synthesis. Tested Nutrition Tested Arginine capsules contain 750 mg of pure L-Arginine per capsule. In addition, the L-Arginine is Tested Arginine is a non-essential amino acid that is involved in protein synthesis. Tested Nutrition Tested Arginine contains 60 full servings per container. Tested Nutrition Tested Arginine contains 240 vegetarian capsules, which means that each full serving of Tested Arginine is 4 capsules, which features a total of 3000 mg (3 grams) of pure L-Arginine. Tested Nutrition Tested Arginine Suggested Use: Take 4 Capsules (3 grams).Tested Nutrition Arginine Capsules come in a 240 capsule container that features a total of 60 full servings. L-Arginine is most well known for its capacity to improve nitric oxide production, but is also used to increg overall performance and endurance. Tested Nutrition Tested Arginine Capsules feature 750 mg of pure L-Arginine per capsule and a total of 3000 mg of L-Arginine per full serving. L-Arginine is a popular ingredient that is a vasodilator that enhances nitric oxide production and increases blood flow to the muscles during workouts. Tested Nutrition Tested Arginine Capsules feature 100 pure L-Arginine. L-Arginine is a non-essential amino acid that is involved in protein synthesis.