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4-IN-1 Elite Formulated Test Stack

  • Amplifies Testosterone
  • Blocks Estrogen and Prolactin
  • Increases Strength
  • Boosts Natural Growth Factors
  • Blocks Estrogen
  • Boosts Natural Growth Factors
  • Promotes Restful Sleep

24-Hour Hardcore Anabolic Activator*

FLEX Stack® Hardcore is a dual attack anabolic activator designed to overload the system with a constant 24-hour barrage of muscle-yielding testosterone, to facilitate extreme muscle growth and maximize anabolic results.* Powered by Methyl Andro™ HARDCORE, an elite testosterone booster that contains FenuPRO™, a specialized blend yielding a minimum of 50% Saponins, Furastanolic Saponins, Protodioscin. Methyl Andro's superior Andro|TEST Blend, which features its dynamic LaxoTest™ Complex, and its 4-IN-1 TEST SUPPORT Matrix helps amplify testosterone levels, block estrogen and prolactin, increase anabolic strength, and boost natural growth factors. This stack is expertly equipped to increase anabolic strength and maximize performance in the gym.*

Z-TEST® is a dynamic nighttime anabolic catalyst that works through 3 different pathways. First, Z-TEST’s exclusive Trib-X Blend™ helps increase the body’s natural testosterone levels while blocking estrogen.* Second, Z-TEST® increases the body’s natural growth hormone (GH) level with its Nocturnal Growth Blend, to help increase muscle hypertrophy, support lean body definition, and improve muscle recovery.* And third, Z-TEST® promotes a more restful, restorative sleep with the ingredients found in its Mental Relax-5 Blend.* Z-TEST’s highly versatile testosterone-inducing formula can be used as a PCT (Post Cycle Therapy) after an intense on-cycle, alone at night to facilitate muscle growth, or in tandem with any testosterone supplement to maximize full anabolic gains.* With Z-TEST®, utilize the nighttime to create a more effective anabolic environment while you sleep!*

24-Hours of Support

Targeting and stimulating key cellular androgen receptors at different times during the day helps keep your body actively responding and adapting. Coupling METHYL ANDRO™ HARDCORE with Z-TEST® supports a 24-hour extreme anabolic state that drives dynamic results.*

Enhance Your FLEX Stack® HARDCORE with PMD®

Use Amplify® XL protein with FLEX Stack® HARDCORE to enhance recovery.* Add a Pump Fuel® INSANITY or an ACG3® SuperCharged+ to increase your gains and maximize muscle output/performance.* These PMD® products are ideal complements to FLEX Stack® HARDCORE for achieving greater results.*

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30 mg of Zinc has been added to Methyl Andro™ HARDCORE to further help support free testosterone.*

Andro|TEST Blend:

600 mg of FenuPRO® Fenugreek Seed Ext. (Trigonella foenumgraecum)(Std. to a Min. of 50% Saponins, Furastanolic Saponins and Protodioscin), along with the LaxoTest™ Complex, a high-powered blend of clinically studied ingredients, including 1 g of D-Aspartic Acid, 200 mg of Smilax officinalis Root Powder, and 200 mg of PrimaVie® Purified Shilajit, which have been shown to support strong increases in healthy testosterone levels, strength, vigor, vitality, antioxidant support and protection from physical stress.*


Methyl Andro™ HARDCORE's ACTIVATE|T Blend, Muscle|GROWTH Blend, Pro-Estro|SUPPRESS Blend, and T|ABSORPTION Agent all work together to further amplify testosterone, block estrogen and prolactin, increase anabolic strength, and boost natural growth factors.* Its Muscle|GROWTH Blend offers a synergistic approach for building muscle mass.* The ingredients in the Muscle|GROWTH Blend help to activate growth factors for quicker recovery and growth development, and elevate natural testosterone levels.* Its Pro-Estro|SUPPRESS Blend supports the suppression of estrogen and prolactin. The suppression of estrogen and prolactin helps to maximize your body’s ability to utilize testosterone, resulting in greater definition and muscle hardness.* And its T|ABSORPTION Agent BioPerine® helps with the uptake and bioavailability of all of Methyl Andro™ HARDCORE's ingredients. The quality of these blends and the ingredients found within are expertly brought together in such a way to make Methyl Andro™ HARDCORE the most elite testosterone amplifier available on the market.*

Trib-X Blend:

Z-TEST's dynamic testosterone support blend includes Tribulus, Indole-3-Carbinol, Diindolymethane (DIM) and Chrysin, which when used in tandem helps to increase both free and total testosterone levels, reduce estrogen levels to raise the testosterone-to-estrogen ratio in the sytem, and provide strong antioxidant protection. And with more testosterone being made available for use, the results are stronger support for building muscle, enhancing mood, elevating sex drive, and taking results to the next level.*

Nocturnal Growth Blend:

Z-TEST® includes L-Dopa, a precursor to dopamine and a chemical in the brain that is linked to cravings and pleasure. L-Dopa is used to maintain elevated dopamine levels, which helps you to resist the urge to overeat at night. L-Dopa may also be used to trigger production of human growth hormone, which in turn builds muscle and reduces fat.* This blend also features melatonin, which helps the body know when it’s time to sleep or when it’s time to wake up. By increasing melatonin production in the evening, Z-TEST® will help make it easier to fall asleep.*

Mental Relax-5 Blend:

Z-TEST® combines Passion Flower Extract, Chamomile, White Button Mushroom, L-Theanine and 5-Hydroxytryptophan (5-HTP) to help relieve and reduce stress, improve focus and concentration, and enhance mood overall. Beneficially, this blend's ingredients also help to support sleep.*

Ingredients & Supplemental Facts Label

Ingredients and Supplemental Facts Label

METHYL ANDRO™ HARDCORE: (By Training Level) Take 3 capsules daily. On workout days take 3 capsules 30 minutes before your workout. On non-workout days take 1 capsule 30 minutes before each meal. METHYL ANDRO™ HARDCORE is best used in cycles of 12 weeks on, 4 weeks off. To be used as part of a physical conditioning program.

Z-TEST®:  Take 3 capsules before bedtime on an empty stomach. Do not consume milk or dairy products 30 minutes before or after taking Z-TEST® (blocks bioavailability). As a PCT (Post-Cycle Therapy): Use alone for 4 weeks. To be used as part of a physical conditioning program.


8-Week Program: Use FLEX Stack® HARDCORE for 4 weeks, followed by the original FLEX Stack® (N-TEST 600® and Z-TEST®) for 4 weeks.

Advantage:  Mass up and cut down to your ultimate hardcore physique.* METHYL ANDRO™ HARDCORE releases the LaxoTest™ Complex facilitating healthy testosterone levels to support muscle growth.* N-TEST 600® then allows for a natural release of free tesosterone to support lean muscle definition.*


8-Week Program: Use the original FLEX Stack® (N-TEST® and Z-TEST®) for 4 weeks, followed by FLEX Stack® HARDCORE for 4 weeks.

Advantage:  Shred down first and use N-TEST 600® to allow for a natural release of free tesosterone that can be used to support lean muscle definition.* Then pack on high quality lean muscle mass with METHYL ANDRO™ HARDCORE. This approach allows for a leaner, more refined muscular physique.*


8-Week Program: Use FLEX Stack® HARDCORE for 8 weeks.

Advantage:  Using FLEX Stack® HARDCORE for 8 consecutive weeks facilitates serious mass building results.* This aggressive fast-acting, hard-hitting testosterone stack option offers the edge to take your results to an unparralleled elite level.


Follow up your FLEX Stack® HARDCORE with Z-TEST® post-cycle to replenish and restore your system, and to achieve optimal results.* Do no exceed recommended dose on any testosterone program!


WARNING: KEEP OUT OF REACH OF CHILDREN. For use by Healthy Individuals only. NOT FOR USE BY THOSE UNDER THE AGE OF 18. DO NOT USE IF YOU ARE PREGNANT, NURSING, OR HAVE A SERIOUS MEDICAL CONDITION. Do not exceed recommended dose. Before consuming seek advice from a health care professional if you are unaware of your current health condition. Consult your physician prior to use if you are taking OTC, prescription medication (including but not limited to MOA Inhibitors), or other dietary supplements. Consult your physician prior to use if you have, or have a family history of, prostate cancer, prostate enlargement, heart, liver, kidney, or thyroid disease, difficulty urinating, diabetes, high or low blood pressure, or low “good” cholesterol (HDL). Exceeding recommended serving may cause serious adverse health effects. Possible side effects include acne, hair loss, hair growth on the face (in women), aggressiveness, irritability, and increased levels of estrogen. WARNING for California residents only: This product contains a chemical known in the state of California to cause birth defects or other reproductive harm. Discontinue use and call a physician or licensed qualified health care professional immediately if you experience rapid heartbeat, dizziness, blurred vision, or other symptoms. Discontinue use two weeks prior to surgery. Do not use in conjunction with alcoholic beverages, when driving a vehicle, or while operating machinery. Do not use if tamper resistant seals are broken. STORE IN A COOL, DRY PLACE. AVOID EXCESSIVE HEAT.

Due to the unique restrictions of amateur and professional sports organizations (e.g., WADA, NCAA, NFL, MLB, NBA, UIL, etc.), it is recommended that you consult with the appropriate governing body before taking this or any other dietary supplement product

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Awesome Results
  • I loved this product. I gained 15 pounds in 8 weeks. I got way stronger and even leaned out in my abs. I noticed more energy throughout the day as well. I body build and this product definitely made the difference.

    "Individual Results May Vary"
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*These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease.