Hybrid Muscle Pump Formula & Powerful Test Amplifier* SUPPORTS NITRIC OXIDE PRODUCTION FOR SUPERIOR MUSCLE PUMPS* INCREASES FREE TESTOSTERONE* STACK WITH YOUR PRE-WORKOUT OR TESTOSTERONE BOOSTER TO ENHANCE PERFORMANCE* Hybrid Muscle Pump Formual & Powerful Test Amplifier* SX-7 researchers have engineered a dual-function formula backed by real human clinical studies on its core ingredients. N.O.x Test SX-7 Black Onyx is an intense nitric oxide and muscle pump inducing formula with the added benefit of boosting testosterone. Using studied key ingredients, N.O.x Test SX-7 Black Onyx delivers a unique experience that is completely stackable with other pre-workouts or testosterone boosters. L-citrulline An amino acid that is a precursor to arginine, shown to reach superior peak plasma arginine levels than a larger dose of L-arginine. L-arginine An amino acid shown to increase blood flow and vasodilation to support muscle pumps* Quercetin A bioflavonoid shown to increase key markers of nitric oxide production and reduce a vasoconstricting factor* Red wine fruit extract Supplies proanthocyanidins a key polyphenol which emerging research shows may support the production of nitric oxide* Boron Shown in human clinical research to increase free testosterone and decrease estradiol in just 7 days. Free testosterone is the most bioavailable form of testosterone and supports the musclebuilding process. Rhodiola crenulata and Ginkgo biloba This combination of ingredients has been shown in a human clinical study to maintain peak testosterone-to-catabolic-hormone ratio and enhance performance. Brassica oleracea and Bladderwrack extract Supplying diindolylmethane and fucoxanthin.