N.O.x Test™ SX-7® Black Onyx™ | GNC

MuscleTech® N.O.x Test™ SX-7® Black Onyx™


Item # 802233
Note: This product cannot be sold in Canada

Product Information



Hybrid Muscle Pump Formula & Powerful Test Amplifier*
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.
  1. 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.
  2. L-arginine – An amino acid shown to increase blood flow and vasodilation to support muscle pumps.*
  3. Quercetin – A bioflavonoid shown to increase key markers of nitric oxide production and reduce a vasoconstricting factor.*
  4. Red wine fruit extract – Supplies proanthocyanidins − a key polyphenol − which emerging research shows may support the production of nitric oxide.*
  5. 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.
  6. 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.
  7. Brassica oleracea and Bladderwrack extract – Supplying diindolylmethane and fucoxanthin.


Nutrition Facts
Serving Size  4 Caplet(s)
Servings Per Container  30

Amount Per Serving     % DV

Calcium 180 mg   18%

N.O. Pump Matrix  0   **
L-citrulline (as L-citrulline and PepForm® L-citrulline peptides)  1500 mg   **
L-Arginine  1000 mg   **
Quercetin Anhydrous  200 mg   **
Red wine extract (as Vitis vinifera)(fruit) Standardized for proanthocyanidins  150 mg   **
Anabolic/Anti-Catabolic Complex  0   **
Rhodiola extract (as Rhodiola crenulata)(root) Standardized for salidrosides  771 mg   **
Broccoli (as Brassica oleracea)(sprout) Supplying diindolylmethane  250 mg   **
Boron citrate Supplying 5% boron  200 mg   **
Bladderwrack extract (as Fucus vesiculosus) (whole plant)  50 mg   **
Ginkgo extract (as Ginkgo biloba) (leaf) Standardized for terpene lactones  5.4 mg   **

** Daily Value (DV) not established.
Other Ingredients
Dicalcium Phosphate Dihydrate, Microcrystalline Cellulose, Hydroxypropylcellulose, Stearic Acid, Coating (Hypromellose, Titanium Dioxide, Polydextrose, Talc, Maltodextrin, Medium Chain Triglycerides), Croscarmellose Sodium, Silicon Dioxide, Magnesium Stearate, Acesulfame Potassium
Contains milk ingredients.
Label (click image to enlarge)

How To Use

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.
For healthy adult men only. Consult a medical doctor before use if you have a medical condition and before starting a diet or exercise program. KEEP OUT OF REACH OF CHILDREN.
Distributed by Iovate Health Sciences U.S.A. Inc. 1105
North Market Street, Suite 1330, Wilmington, DE 19801.
Made in the U.S.A. from international ingredients.


4.8 / 5.0
31 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Stay Away
Overpriced for cheap garbage ingredients. All these reviews here are bogus. Did nothing apart from a hole in my wallet
October 27, 2016
Awesome natural boost!
Couldn't be happier with this new SX-7 lineup from MT! There's no better way to come up with true results from natural test boosting and giving yourself that added edge when your experiencing lows and plateauing. I have been using this product for several weeks and it couldn't have come at a better time. My results have been great and having done my own research on the effects of Rhodiola and Ginkgo as a natural boost were proven! I did receive this product as part of MuscleTechs testing and again couldn't be happier! I would highly recommend giving this product a run especially if like me, your experiencing a low in your current routine!
February 25, 2016
Awesome Pump
Loving the pump from this product, 2 pill pre workout and you're good to go. Highly recommended!
February 15, 2016
Great supplement!
I can tell my Testosterone is already beginning to increase. It took a few days to load it out after that I can feel the difference. Will buy again.
February 15, 2016
Amazing long lasting pumps
I started taking this on heavy workout days and had felt a lot fuller and stronger. I decided to take it on my cardio only days were I also fit in isometrics. Within minutes of doing the isometrics I would look like I had been in the gym for hours. The pumps were insane. It also increased my sweat rate which was an added plus because I was looking to lose a few lbs. I usually jump in the pool after my workouts to refresh myself and after working out with this I feel like I can swim laps.
February 10, 2016
Excellant N.O.
Had opportunity to try this product and its everything the reviews said I stack it with the rest of the Black Onyx line and its great... I defiantly recommend the SX-7 Black Onyx Line
February 7, 2016
New Era Of Test and Pumps!
This is a wonderful combination that made my workouts a total revamping in the way I perform at the gym. I was pumped almost immediately at my warm ups and the overall raw power increased. No doubt that N.O.c Test is the evolution of new supplements that can get you far away from the pack. I would defiantly recommend it to mid and advanced athletes, because the workouts are going to be 100% more productive that they ever had before.
February 6, 2016
Big Pumps
I started taking this with my pre workout and have really noticed a bigger pump when lifting. It's awesome to feel and see something work. MuscleTech made another great product.
February 6, 2016
Great Feeling!
Felt a significant pump in my workouts my taking this product especially after two weeks. Real intensity during my workouts. Very noticeable increases in my bench and squat. Can’t wait to see how much more progress I can make in two more weeks.
February 5, 2016
Awesome Product to Add to Your Stack!
I received this product for free as part of the MuscleTech Product Test Team and I have been very pleased after almost three weeks of use. I added this product to my stack while cutting down and it has delivered great pumps during workouts that seem to never go away. Within about 1.5 weeks of use, my muscle definition and vascularity was greatly improved and the ingredients included have noticeably increased my test levels (great for the gym and the bedroom). Four pulls one time per day is very easy and they are easy to swallow. My first bottle was free but I have already ordered a second bottle for another month. Well worth the price!
February 5, 2016
Start typing your question and we'll check if it was already asked and answered. Learn More
No questions have been asked about this item. Be the first!