MUSCLETECH
L-Arginine SX-7 Black Onyx 466 grams

L-Arginine SX-7® Black Onyx™ delivers a powerful, pump-inducing matrix that quickly disperses into your bloodstream when you need it most!

Nitric oxide (NO) is a signaling molecule that increases blood flow to the muscle and is absolutely crucial in the formation of muscle pumps! The amount of NO your body makes is tightly controlled by an enzyme called nitric oxide synthase. When you train hard, the activity of nitric oxide synthase increases, which means more NO is made. When you start exercising, signals are sent to the nitric oxide synthase enzymes to make a lot more NO. This allows NO to work quickly on the muscles and the blood vessels to create a pump and influence muscle expansion. Nitric oxide helps to relax blood vessels and cause rapid vasodilation, massive pumps, the most extreme muscle hardness and the freakiest vascularity with every rep!

The advanced arginine matrix in L-Arginine SX-7 Black Onyx supplies three forms of L-arginine – the critical precursor to nitric oxide.

Plus, it’s sugar free and non-stimulant, so it can be stacked with any other SX-7 Black Onyx product for your best workouts.

Powerful Nitric Oxide Precursor

MuscleTech® researchers developed the most advanced, ultra-pure, triple-sourced L-arginine formula ever. L-Arginine SX-7® Black Onyx™ delivers 6,000mg of L-arginine, including ultra-pure micronized L-arginine for rapid uptake and dispersal in your body.

When you train, various physiological triggers cause a release of calcium in the endothelial cells that line the blood vessels, which causes the enzyme nitric oxide synthase to make nitric oxide from the amino acid L-arginine. The nitric oxide then leaves the endothelial cell to facilitate relaxation of the smooth muscle cells lining the blood vessels, allowing for vasodilation and more blood to enter the skeletal muscle, leading to a pump!

By supplying a massive dose of L-arginine to your body, L-Arginine SX-7® Black Onyx™ helps trigger extreme nitric oxide production for superior vasodilation effects and massive muscle pumps.

Superior Vasodilation

L-Arginine SX-7® Black Onyx™ supports vasodilation to facilitate increased blood flow, improved oxygen utilization and enhanced nutrient delivery!

Tested for Quality and Purity

To ensure a high standard of quality, each batch of L-Arginine SX-7® Black Onyx™ also undergoes strict quality control and is third-party tested and verified to ensure that each bottle meets the highest standards of purity, quality and consistency.

L-Arginine SX-7® Black Onyx™ was flavored by experts in one of the world’s top flavoring houses in order to taste incredibly delicious! We’re confident you’ll love the mouthwatering flavor!

RECOMMENDATION: mix 1 serving (1 scoop) with 12 to 16 oz. of water and take once daily. For muscle pumps, take 1 scoop 20 to 30 minutes before your workout. Do not exceed 1 serving (1 scoop) in a 24-hour period. Read the entire label before use and follow directions provided.

NET CONTENT: 466 grams