This site groups L-Arginine HCl and Grape Seed Extract together specifically under circulation and antioxidant support — worth understanding why these two are paired.
L-Arginine HCl is described as an amino acid involved in the body's natural nitric oxide production, supporting circulation, while Grape Seed Extract is described as a polyphenol-rich extract providing antioxidant support.
This site frames both ingredients around everyday circulation and antioxidant support as part of general vitality — not as a claim to treat any diagnosed cardiovascular or other medical condition.