This supplement pairs arginine with alpha-ketoglutarate. Athletes often take it before a workout to raise nitric oxide levels, relax blood vessels, and increase blood flow. Many notice better endurance and a fuller muscle pump during resistance training. For faster absorption, take it on an empty stomach.
Some users choose this form believing it causes less stomach upset than standard arginine. Current evidence does not back that claim. Dosing varies by product.
Caution: Avoid if you have herpes, because arginine can trigger outbreaks. If you take medication for blood pressure or diabetes, speak to a doctor before use.