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.


4.8 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Great Test Booster!
I stacked this with MuscleTech's Hydroxycut Non-Stim SX-7, CLA 4X SX-7, Ultra Carnitine 3X SX-7, & Apple Cider+ SX-7 for the ultimate weight loss stack while preserving muscle mass. I've been taking these products for 2.5 weeks & loss 2.5 lbs, with no loss in muscle mass. My overall appearance, looks like I've actually increased my muscle mass while decreasing my body fat mass. I am in a calorie deficit, tracking my macros to control all variables. I definitely recommend this product by itself or in a stack to help reach your fitness goal.
October 18, 2017
Great T booster
One of the BEST test products out there. Non proprietary blend bs. I’m sure everyone’s results will be different but for me I was able to notice a spike in my T levels. Will continue to use and hopefully see greater results once I stack it with my workout supplements. But for now. Great product I would definitely recommend
October 15, 2017
Some increased energy
October 14, 2017
Love this Product Line
Great Test booster! Saw increase in strength and energy. Also aided in recovery from lifting. Excellent product!
October 14, 2017
Great product line
Love this product and you can definitely feel the boost. No crazy side effects and love that MT shows you what is in the label. Great to take between cycles as I love the strength.
October 14, 2017
Three Test Products in One
I received this product from MuscleTech to try out. I stacked it with the Black Oynx Hydroxycut SX-7 Non-Stim, Black Onyx CLA, Apple Cider Vinegar and the Black Onyx SX-7 CLA. Each serving provides an adequate amount of three proven test boosting supplements with additional enhancing elements. I felt I was able to increase weight while using this product and less muscle soreness.
October 14, 2017
Great testosterone booster. Love seeing muscletech change it up!
October 13, 2017
Great product!
This product gives you energy, drive, focus, and a little extra aggression. Definitely gained strength while using it! Give it a shot.
October 13, 2017
Good for my workouts
As I get older, if I can get a boost in testosterone, that is a good thing. My workouts have been easier to get through and my recovery time is shorter with this product.
October 13, 2017
Testosterone, wellness, vitality
All Rise!
Best Test I've used. Literally on some of my late workouts I'd pair this with Peak or NaNox9 and hit the gym. Swole city, energy without aggression. Most importantly no acne face.
October 12, 2017