Citrulline is needed to make L-Arginie, an amino acid that boost 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 tow limitations.

First, they contain large citrulline particles that can not be absorbed completely.

Second their contents are released all at once, so they don't stay in the bloodstream long. 

Let's take a look at the Highlights of QOL Citrulline-SR:

Benefits of Citrulline: 

• Increases production of nitric oxide for better blood flow*
• Promotes normal blood vessel function and heart rate*
• Helps maintain blood pressure already within a normal range*
• May improve athletic performance*
• May support male sexual function*  

*These statements have not been evaluated by the Food & Drug Administration.
These products are not intended to diagnose, treat, cure or prevent any disease.