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Healthy Circulation10-hour Sustained ReleaseGradual Release into the BloodstreamHigher Blood Levels Over a Longer TimeMore Bioavailable than Regular CitrullineVeganGluten FreeNon GMOGMPDietary SupplementCitrulline is needed to make L-arginine an amino acid that boosts production of nitric oxide in the body. Nitric oxide increases circulation supporting cardiovascular health athletic performance and male sexual function. Importantly citrulline actually raises arginine levels more effectively than arginine itself. Conventional citrulline products have two limitations. First they contain large citrulline particles that can't be absorbed completely. Second their contents are released all at once so they don't stay in the bloodstream long. Manufactured using patented MicroActive® technology Citrulline-SR is: Composed of citrulline particles that have been reduced in size to increase absorption. Released gradually over 10 hours for a steady supply of citrulline throughout the day.This product is suitable for vegetarians and is gluten-free.