Test 3X™ SX-7® Black Onyx™ | GNC

MuscleTech™ Test 3X™ SX-7® Black Onyx™


Item # 802234


Size: 30 Caplets

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Note: This product cannot be sold in Canada


Product Information


Test 3X™ SX-7® Black Onyx™ is the most advanced testosterone-enhancing pill on the market today. Many testosterone-boosting pills aren’t backed by a single human clinical trial. But Test 3X™ SX-7® Black OnyxTM features three powerful ingredients backed by separate human clinical trials that are actually shown to boost testosterone, decrease estradiol and reduce a key catabolic hormone.*

How Does It Work?
Test 3X™ SX-7® Black OnyxTM has a multi-platform formula that delivers three distinct benefits. First, it increases free testosterone levels. Then, it works to optimize the testosterone-to-estradiol ratio by decreasing estradiol. Lastly, it reduces a key catablic hormone, making it a truly complete and powerful testosterone-boosting formula.*

Test Subjects Increased Testosterone by Over 40%
Test 3X™ SX-7® Black Onyx™ features a clinical dose of D-aspartic acid, shown to increase testosterone by over 40% and increase luteinizing hormone by over 30% while staying within the normal healthy range.

Boost Free Testosterone in Just 7 Days
Test 3X™ SX-7® Black Onyx™ is also formulated with a powerful and concentrated dose of boron that is shown in human clinical research to increase free testosterone and decrease estradiol in as little as 7 days. Free testosterone is the most active form of testosterone and is critical to initiating the strength-building process.*

Decreases a Key Catabolic Hormone by 14.5%
What makes Test 3X™ SX-7® Black Onyx™ truly unbeatable is the use of the advanced ingredient Withania somnifera, which is shown to reduce a key catabolic hormone by an astonishing 14.5%. Test 3X™ SX-7® Black Onyx™ also delivers yacon root and olive leaf. Experience its shocking power and potency for yourself.*

Label (click image to enlarge)


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


Not intended for use by persons under 18. Do not use if pregnant or nursing. Consult a medical doctor before starting any diet or exercise program or if you have a medical condition or are taking any medication. Discontinue use 2 weeks prior to surgery. KEEP OUT OF REACH OF CHILDREN.

Other Ingredients

Microcrystalline Cellulose, Stearic Acid, Coating (Titanium dioxide, Polyethylene glycol, Talc), Croscarmellose Sodium, Magnesium Stearate, Crospovidone, Silicon Dioxide, Acesulfame-Potassium
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

Nutrition Facts

Serving Size  4 Caplets
Servings Per Container  30

Amount Per Serving     % DV

Vitamin B6 (as Pyridoxine Hydrochloride) 2 mg   100%
Folic Acid 200 mcg   50%
Vitamin B12 (as Cyanocobalamin) 1 mcg   17%
Zinc (as Zinc Gluconate) 30 mg   200%

Test Extreme Matrix  0   **
D-Aspartic Acid (DAA)   3.12 g   **
Tribulus fruit extract (as Tribulus terrestris) Standardized for 45% saponins  250 mg   **
Boron citrate Supplying 5% boron  200 mg   **
Ashwagandha root and leaf extract (as Withania somnifera) (Sensoril®)  125 mg   **
Safed musli root extract (as Chlorophytum borivilianum)  100 mg   **
Yacon root (as Smallanthus sonchifolius)  100 mg   **
Olive leaf extract (as Olea europaea) Supplying oleuropein  50 mg   **

** Daily Value (DV) not established.


4.5 / 5.0
11 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Best I've ever used
Absolutely the best text booster on the market! I felt great while taking it! Noticed increase in strength and stamina!! I would definitely recommend this to anyone looking for an extra boost on the gym!!
September 24, 2017
Test 3x Black Onyx
I just started using this product a week and a half ago and have been been feeling amazing ever since using it. First of all my days are filled with more energy and motivation as to what they were before, and second of all I have been getting a lot more lean since using it all while still having just as much strength but able to push harder. I would recommend this product to people that have no motivation or lacking energy to go and be active.
September 19, 2017
Best test booster!
This product is by far my favorite test boosting product I can see my numbers going up already!
September 18, 2017
I'm 49 years old,I have been using MUSCLETECH Test 3xSx-7 Black for over 30 days now with amazing results The 1st week I took it I could feel a difference. I have more energy during the day. I now sleep through the whole night. I'm now starting my 2st bottle and I'am feeling happier and my mood has been great.
September 17, 2017
Feel no change for me waste of money
July 22, 2017
2 months ago
I have been using this product for over a year now with amazing results it might take three to four weeks before you notice anything but this really works I'm 57 years old I don't go to the gym and I'm pretty well cut after taking this product I love it
July 22, 2017
2 months ago
Really can tell a difference.
I have been on this supplement for about 6 months. I can really tell in the energy level through out the day and the early morning reaction that my body has is like it was in my thirties.
July 16, 2017
4 months ago
Just finished my first week on test 3x. I have tried four different test boosters and this is by far the best. Experienced better pump in the gym with faster recovery time and less soreness. I am a light sleeper and usually don't get 8 hours of uninterrupted sleep. Since on this i have slept like a baby. I would recommend this to anyone looking for that extra push to get over that plateau.
June 18, 2017
Everyone should try
I'm 42 years old. The 1st day I took it I could feel a difference. I do feel more energy during the day. I now sleep through the whole night. I'm on my 1st bottle still 3rd week but I do feel in a happier mood.
June 17, 2017
I have tried several different testosterone boosters before and like it's title says it 3Xed the competition. I felt the difference after the first 4 pills. Try it for yourself.
May 19, 2017