L-arginine is an amino acid the body converts into nitric oxide, a compound involved in relaxing and widening blood vessels to support circulation.
Because of this role, it's a common ingredient in formulas focused on blood flow, stamina and performance.
In VigorHorse, L-arginine is paired with tribulus terrestris and horny goat weed extract in the same proprietary blend.
Where it fits in VigorHorse: L-Arginine is one of eight ingredients in the 82 mg proprietary blend. See how it's positioned to work on our how it works page.