N.O.x Test SX-7 Black Onyx | MuscleTech

Test Booster

N.O.x Test SX-7

  • Supports nitric oxide production for superior muscle pumps
  • Increases free testosterone
  • Stack with your pre-workout or testosterone booster to enhance performance

Advanced Hybrid Test Booster & Muscle Pump Formula

Team MuscleTech® researchers have engineered a dual-function formula packed with ingredients that have been researched with real human clinical studies! N.O.x Test™ SX-7® Black Onyx™ is both a powerful testosterone booster and intense muscle pump inducer. 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!

Introducing: N.O.x Test SX-7® Black Onyx

Powerful Nitric Oxide Support for Superior Muscle Pumps!

N.O.x Test™ SX-7® Black Onyx™ delivers skin-stretching pumps with powerful nitric oxide support agents, including L-citrulline and quercetin anhydrous. This potent pump complex is engineered to support nitric oxide production for superior muscle pumps.

Increases Free Testosterone

N.O.x Test™ SX-7® Black Onyx™ not only provides powerful nitric oxide support, this powerful formula also helps improve performance by boosting free testosterone levels – a key factor is if you’re looking to perform at your best!

Packed with several Powerful Ingredients


An amino acid that is a precursor to arginine shown to reach superior peak plasma arginine levels compared to a larger dose of L-arginine.

Quercetin anhydrous

A bioflavonoid shown to increase key markers of nitric oxide production and reduce a vasoconstricting factor.­

Red wine fruit extract

Supplies polyphenols, which emerging research shows may support the production of nitric oxide.

Rhodiola crenulata and Ginkgo biloba

This powerful combination of ingredients has been shown in a human clinical study to maintain peak testosterone-to-catabolic-hormone ratio of subjects engaged in an intense training regimen. This can help reduce catabolism and enhance performance.


An amino acid precursor to nitric oxide to support muscle pumps.

Brassica oleracea

Supplies diindolylmethane (DIM).

Bladderwrack extract

A seaweed found on temperate coasts that supplies fucoxanthin.


Delivers a scientifically studied dose of boron, shown to increase free testosterone and decrease estradiol levels.2

1. Chin J Integr Med. 15(3):177-83.
2. Naghii et al., 2011. Journal of Trace Elements in Medicine and Biology. 25:54-58.

Tested for Quality and Purity

Each batch of new N.O.x Test™ SX-7® Black Onyx™ 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.

N.O.x Test SX-7 BLACK ONYX Is Superior to the Competition

N.O.x Test™ SX-7® Black Onyx™ Competitor What You Should Know
L-citrulline (as L-citrulline and PepForm® L-citrulline peptides) 1,500mg Yes (amount uknown – hidden in a proprietary blend) While the competitor contains this key nitric oxide support ingredient, they hide the amount in a proprietary blend – you’ll never know how much you’re taking! N.O.x Test SX-7 Black Onyx, on the other hand, fully discloses all the ingredients, including the powerful new PepForm® L-citrulline peptides.
Quercetin anhydrous 200mg No Clinical dose of quercetin – a bioflavoroid shown to increase key markers of nitric oxide production and reduce a vasoconstricting factor.
L-arginine 1,000mg No N.O.x Test SX-7 Black Onyx is packed with a full gram of L-arginine. This amino acid has been shown to provide nitric oxide support for improved blood flow and fuller, harder muscles.
Rhodiola crenulata and Ginkgo biloba Yes (771mg and 5.4mg) No Unique combination of key ingredients shown to maintain peak testosterone-to-catabolic-hormone ratio of subjects engaged in an intense training regimen.
Red wine fruit extract (as Vitis vininfera) 150mg No Supplies polyphenols to help support nitric oxide production.
Brassica oleracea 250mg No This key ingredient provides diindolylmethane.
Bladderwrack extract (as Fucus vesiculosus) (whole plant) 50mg No A novel ingredient that supplies the carotenoid fucoxanthin.

How To Take N.O.x Test

Take 1 serving (4 caplets), once daily. Do not exceed 4 caplets in a 24-hour period. Read the entire label before use and follow the directions provided.

Supplement Facts



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