Test HD Black Onyx® | GNC

Product Information



Extreme Results Testosterone
  • Testosterone
  • Vitality
  • Reduce Cortisol

Research-Backed Ingredients. Clinical Doses. Full Transparency. All Power.
New Test HD Black Onyx® is the most advanced testosterone-enhancing pill. It's built with the scientifically validated ingredients shown to reduce cortisol and boost free testosterone.

Boost Free Testosterone in 7 Days -
Test HD Black Onyx® features four separate ingredients backed by separate human clinical studies shown to boost testosterone or combat cortisol - most competitors have none! Just one of those ingredients is shown to increase free testerone and decrease estradiol in a little a 7 days.

Testosterone is Critical for the Strength Building Process
Test HD Black Onyx® is the only testosterone-boosting formula to combine clinically researched doses of Sensoril® Ashwagandha, Primavie® Shilajit and D-aspartic acid, plus the much sought-after ingredient Longjack. Many competitors using these ingredients only include supportive doses or hide the amounts in proprietary blends, making the other guys inferior to our fully disclosed formula. Only Test HD Black Onyx® is engineered with full doses of key ingredients engineered to boost free testosterone levels. Free testosterone is the most active form of testosterone, and is critical to initiating the muscle and strength-building process, as well as supporting performance.


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

Amount Per Serving     % DV

Vitamin B6 (as pyridoxine hydrochloride) 2mg   100%
Folic Acid 200mcg   50%
Vitamin B12 (as cyanocobalamin) 1mcg   17%
Zinc (as Zinc Gluconate) 30mg   200%

Test Extreme Matrix  0   **
   D-Aspartic Acid   **
   Boron citrate Suppyling 10mg boron   **
   Primavie® Shilajit extract Standardized for 50% fulvic acid   **
   Sensoril® AShwagandha extract (as Withania somnifera)(root and leaf) Standardized for 5% withanolides   **
   Longjack extract (as Eurycoma longifolia)(root)   **
   Asian ginseng extract (as Panax ginseng)(root) Standardized for 5% ginsenosides   **
   Stinging nettle extract (as Urtica dioica)(root)   **
   Safed musli extract (as Chlorophytum borivilianum)(root) Standardized or 5% saponins   **

** Daily Value (DV) not established.
Other Ingredients
Coating (Titanium dioxide, Polyethylene glycol, Talc), Microcrystalline Cellulose, Dicalcium Phosphate Dihydrate, Croscarmellose Sodium, Stearic Acid, Silicon Dioxide, Magnesium Stearate
Label (click image to enlarge)

How To Use

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 1 Do not use if pregnant or nursing Not intended for use by persons under 18. Do not use if pregnant or nursing. Discontinue use 2 weeks prior to surgery. Consult a medical doctor before starting any diet or exercise program or if you have medical condition. This product should not be consumed for more than 4 consecutive weeks with a 2 to 4 week period between cycles. KEEP OUT OF REACH OF CHILDREN.
Store in a cool dry place.
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.


5.0 / 5.0
9 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
A Legit Test Booster
Once again Muscletech delivers !!! This test booster works and is noticeable within 72 hours. I have notivced increased stamina in my workouts and as a 32 year old male its needed.
October 16, 2018
First time won’t be the last time
This product gave me that extra boost I felt that i needed! This was my first time trying Test HD and I felt more powerful, had more of a burst, and felt less worn out after my workout! If you’re on edge about trying a Test Booster for the first time, you won’t regret trying this one. I highly recommend it!
October 16, 2018
Drive in the bedroom and the gym
Best test booster I've tried. After a solid push day it makes my chestcles dance.
October 12, 2018
I cannot believe the results I have seen from taking this product! My muscles are more full, I can complete more reps, energy is limitless !
October 12, 2018
Muscle Tech does it again! This new formula for Test HD is amazing! Increased strength and lean mass gain after just a week! HIGHLY recommend this product!
October 11, 2018
This is a great product and lover use this one before used two front ones but I can feel the difference from this one then the other ones that I've used before I will always use MuscleTech products
October 11, 2018
Fantastic Test booster
This product is amazing. It's definitely going to give you noticable results. The non proprietary blend is amazing. It's also a great price point. I have used another formula by them and I think this does the same job at a lower cost.
October 11, 2018
Excellent product for
I got this for my boo who need this to help him function since he been on it he’s been more active and more manly. I thank you for allow my man to try it.
October 11, 2018
Bear stuff on the market
This stuff is awesome! I am already more vascular after two weeks and on top of that I have seen some weight gain of 4 lbs. as a guy who is 150 that is awesome!!
October 11, 2018
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