About the product
- Arginine Plus Cofactors: Antioxidants and methylating factors augment arginine benefits*
- Sustained Release: Provides optimal levels of L-arginine with twice daily dosing
- For Athletes: Supports lean muscle mass and work capacity during exercise*
- Third-Party Certified: This product has been third-party tested and certified to verify what\'s in the package matches what\'s on the label and to confirm it contains no unsafe levels of contaminants
- Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners
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