• Research & Development
• Testosterone/Vitality/Reduce Cortisol
• 3 g D-Aspartic Acid, 200 mg Shilajit, 125 mg Sensoril®, 100 mg Longjack / Per Serving
• Extreme Results
• Dietary Supplement
• Primavie® - Purified Shilajit
• Sensoril® - Vitalizing Mind & Body
• America's #1 Selling Bodybuilding Supplement Brand‡
• Scientifically Researched Key Ingredients

Research-Backed Ingredients. Clinical Dose, Full Transparency. All Power.

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! One of those ingredients is shown to increase free testosterone 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.

‡MuscleTech® is America's #1 Selling Bodybuilding Supplement Brand based on cumulative wholesale dollar sales 2001 to present.