Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™
Test Fx™: Prohormone, Testosterone, and hGH Booster - CATEGORY5™

Test Fx™: Prohormone, Testosterone, and hGH Booster

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All-In-One Potent Mass Gaining Formula; Prohormone, Testosterone and hGH Booster

TEST Fx™ is the perfect choice for serious athletes looking for something to push them past those stubborn plateaus and transform their physique. It is now available with the combination of our PCT MAX known as our AndroMass Stack! The reason this stack is so effective at building muscle and shredding fat is due to it's unique combination of both a prohormone (Dehydroepiandrosterone-aka androstenolone) along with compounds to increase your natural testosterone production, nitrogen retention which increases protein synthesis, and IGF-1 levels which are involved in the hGH (Human Growth Hormone) pathway. By combining natural testosterone boosting compounds with our prohormone it ensures that your natural production is not diminished by the addition of the outside androgen (testosterone) source as well as aiding in the effects androgens have for muscle growth and recovery as well as libido. We also packed in 5-methyl-7-methoxyisoflavone to increase how much nitrogen your body retains which in turn increases overall protein synthesis, as well as Deer Antler Powder to increase your IGF-1 levels; a critical hormone in the hGH pathway that signals for cell growth on the cells it binds to. With 100mg of Androstenolone per capsule and over 500mg of other active compounds, there's no way you wont feel the effects working inside the gym and out!


  • Increases in Testosterone, IGF-1s, and Protein Synthesis
  • Increases in Muscle Mass, Strength, and Pumps
  • Shredding of excess Fat
  • Increased Recovery and Growth
  • Increased Libido

What Cycle Should I Do?

Recommended Cycles
StrengthCapsules LengthTest Fx DailyAndrostenolone DailyOn-Cycle Support*PCT*
Beginner30-454-6 Weeks1 Capsule100mg2 Tablets (Daily)2 Capsules (Daily)
Standard60-1204-8 Weeks2 Capsules200mg2 Tablets (Daily)2 Capsules (Daily)
Advanced90-1804-8 Weeks3 Capsules300mg2 Tablets (Daily)2 Capsules (Daily)

The Science

How Does Androstenolone Work and How is It Different Than A Test Booster?

Androstenolone is considered a prohormone because it is a precursor to more potent androgens such as Testosterone and DHT (dihydrotestosterone). Androgens are hormones that have the ability in the body to bind to what are known as androgen receptors. When these receptors are bound protein synthesis increases greatly and cell growth is turned on. Two of the most potent compounds we know (they have the best affinity for the androgen receptors) are Testosterone and Dihydrotestosterone which are the compounds Androstenolone are converted to in the body. When ingested, tissues in your body metabolizes the androstenolone to generate testosterone and DHT, but androstenolone by itself also has the ability to bind androgen receptors on its own (to a lesser affinity than Testosterone + DHT). So between its conversion to potent androgens and its ability to act as an androgen by itself, Androstenolone is a great mass building compound. Since it's not methylated and not converted by the liver, there is no liver toxicity associated with this prohormone as well!


This differs from a test booster as test boosters work to increase your natural production of testosterone while prohormones actually supply an outside source. TEST Fx contains both of these types of compounds.


Why PCT MAX as Well?

Whenever outside sources of testosterone are supplemented, whether it be the actual hormone or precursors that convert to testosterone after metabolization, it is important to supplement with a PCT: Post-Cycle Therapy. While these are typically associated with the use of anabolic steroids(which we know none of you are abusing), there are many other compounds that work using that same pathway and can generate the same side-effects if a PCT is not used or not used appropriately. For example, our TEST Fx packs 100mg of DHEA per capsule- a strong prohormone that is eventually converted into testosterone once metabolized by the liver. An increase in testosterone can bring along effects from increased estrogen (as there’s more testosterone to be converted to estrogen by the enzyme aromatase), an eventual decrease of natural testosterone production, and the additional work for your liver as that is the site of detoxification for your body.


PCT MAX is a tri-blend post-cycle therapy that works in 3 different ways to provide solutions to these 3 problems:


EstroControl Blend

Provides naturally occurring compounds that prevent the body from synthesizing the aromatase enzyme that is responsible for the conversion of androgens(anabolic hormones) to estrogen. Blocking the synthesis of this enzyme doesn’t wipe it out completely though, allowing you to maintain natural estrogen levels (needed for proper function and muscle growth) and you won’t have to worry about diminishing IGF-1 levels which can occur with other Aromatase Inhibitors.


TestSupport Blend

Jumpstarts and skyrockets your natural test production to avoid diminished production rates and even helps to continue to build muscle once the outside Testosterone source is stopped.


LivSupport Blend

Packed with milk thistle and n-acetyl-l-cysteine, this blend helps negate any stress that can be placed on your liver and cleanses any impurities

Science-Backed Research

Tribulus Terrestris- a naturally occurring plant that produces fruit covered with spines and its extract has been used as medicine for a number of various complaints. One of the most studied effects is the ability of the plant to naturally raise testosterone production, in which it has showed increases of an average of 16.3%[1]. More testosterone means way more gains, and it’s even better that it can be done naturally.
DHEA (Dehydroepiandrosterone)– A hormone produced by the adrenal glands, liver, and testes that s a precursor to testosterone and estrogen. When metabolized in the body the DHEA becomes Androstenedione, which then becomes the ever effective muscle packing hormone of testosterone. DHEA has been seen to provide changes in body fat mass and strength[2]. DHEA has also been linked to supporting increased levels of insulin-like growth factor 1, which insulin is one of the most important hormones when trying to put on clean, dense size. DHEA's stimulation of IGF-1 activity is supported by several human trials. These studies have also revealed that DHEA can stimulate GH - growth hormone (somatropin) - release. Therefore, the increase in IGF-1 can be explained by the increase in GH, since GH is converted to IGF-1 in the liver[3]. Growth Hormone and Testosterone…GAINS HERE WE COME!
Deer Antler- Deer antler velvet provides a series of health benefits ranging from improved immune function and mental capacity, to improved cell growth with anti-tumor and anti-viral components. One of the main benefits seen through deer antler velvet however is that it is a natural source of IGF-1, which promotes cell growth. Deer antler velvet has relentlessly proven its strength and endurance increasing abilities, and now it’s your turn to experience it yourself with this 100mg per capsule formula. Do yourself this favor and experience it.
Tongkat Ali Root- a therapeutic herb native to the Malaysian rain forests. Like many other exotic plants, Tongkat Ali is popular in traditional medicine. Its primary use has been to promote healthy libido and support normal hormone levels in males. Tongkat Ali root has been seen to increase free testosterone levels by 104%, and by 88% total testosterone levels[4]. This has repeatedly been shown to increase muscle mass as well[5]. Natural Testosterone? Who wouldn’t want that?
5-Methyl-7-Methoxy-Isoflavone- is a naturally-derived non-hormonal anabolic and anti-catabolic compound known as a flavone. It has been shown to decrease cortisol levels, increase protein synthesis, and improve overall recovery from exercise. This potent , safe, compound works by increasing protein synthesis and nitrogen retention without having the androgenic side effects of steroids. AKA not converting to estrogen. Patented by pharmaceutical experts Chinoin (US Patent # 4,163,746), 5-methyl-7-methoxyisoflavone is designed to promote muscle growth while at the same time increasing fat loss. Even better to add to this compound is the patent shows that it's free from "androgenic or liver-damaging side effects". There have been studies shown that the compound has increased body mass 7%-20%[6]. Gains with no effect on hormone production or organ function, We know you’re all ready to hit your new PR’s.
Rhodiola rosea- a remarkable herb that has a wide and varied history of uses. It is thought to strengthen the nervous system, fight depression, enhance immunity, elevate the capacity for exercise, enhance memory, aid weight reduction, increase sexual function and improve energy levels. It has long been known as a potent adaptogen. Adaptogens are substances that increase the body's overall resistance and help to normalize bodily functions. Since here at CAT5, overall health is the priority and the key to success, we understand the fact of including important healthy herbs. As previous ingredients help overall health as well, this one is a staple. To help increase muscle, rhodiola rosea has been seen to shorten recovery time after prolonged workouts, to increase attention span, memory, strength, and anti-toxic action. Rhodiola rosea extract increases the level of enzymes, RNA, and proteins important to muscle recovery after exhaustive exercise. It also stimulates muscle energy status; glycogen synthesis in muscles and liver; muscle protein synthesis and anabolic activity. However, the herb is also attributed to combating depression through increasing precursors to serotonin, tryptophan, and 5-HTP; relieving stress due to is adaptogen ability to normalize body functions; increasing memory by increasing the bioelectrical activity of the brain which improves memory and brain energy; aid cardiac problems by decreasing the amount of catecholamines and corticosteroids released by the adrenal glands during stress; combat cancerous cells due to its ability to increase anti-tumor activity by increasing the body's resistance to toxins; and improving immune function due to its ability to regulate body functions, decrease stress, and increase natural killer cells in the stomach and spleen. This means gaining muscle, while improving health[7]. Make this commitment to yourself, for yourself!

Alpha Lipoic Acid- is a compound found naturally inside every cell in the body. It's needed by the body to produce the energy for our body's normal functions. Alpha lipoic acid converts glucose (blood sugar) into energy. This promotes healthy energy levels. What’s even better about Alpha Lipoic Acid is that it’s a known antioxidant. This means that it is efficient in neutralizing substances called free radicals that can turn potentially harmful if they attack cells. Alpha lipoic acid is a unique antioxidant as it functions in both water and fat, unlike other common antioxidants, vitamin, and E[8]. Energy+Health= Success in the gym and out for everyone!



[1] Sellandi, T. M., Thakar, A. B., & Baghel, M. S. (2012). Clinical study of Tribulus terrestris Linn. in Oligozoospermia: A double blind study. Ayu, 33(3), 356–364. http://doi.org/10.4103/0974-8520.108822


[2]The effect of six months treatment with a 100 mg daily dose of dehydroepiandrosterone (DHEA) on circulating sex steroids, body composition and muscle strength in age-advanced men and women. Morales AJ, Haubrich RH, Hwang JY, Asakura H, Yen SS.Clin Endocrinol (Oxf). 1998 Oct;49(4):421-32


[3] Dehydroepiandrosterone (DHEA) modulates GHRH, somatostatin and angiotensin II action at the pituitary levelC Suárez, J Vela, I García-Tornadú and D Becu-Villalobos Instituto de Biología y Medicina Experimental, CONICET, V, Obligado 2490, Buenos Aires 1428, Argentina


[4] Vespesian, Michael. "Does Tongkat Ali Work? Yes, and Here's Proof." Testosteroned. N.p., 01 May 2013. Web. 30 Mar. 2017.


[5] Ang HH, Lee KL, Kiyoshi M. Eurycoma longifolia Jack enhances sexual motivation in middle-aged male mice. J Basic Clin Physiol Pharmacol. 2003;14(3):301-8.


[6] "7-Isopropoxyisoflavone, 5-methyl-7-methoxy-isoflavone." 7-Isopropoxyisoflavone, 5-methyl-7-methoxy-isoflavone. Lyons Protein Source, 2017. Web. 30 Mar. 2017.


[7] "Rhodiola Benefits & Information (Rhodiola Rosea)." Herbwisdom. RFI Media Ltd, 2017. Web. 30 Mar. 2017.


[8] Cathy Wong, ND - Reviewed by a Board-certified Physician. "What Is Alpha Lipoic Acid?" Verywell. About, Inc, 23 Aug. 2016. Web. 30 Mar. 2017


  • Increases in Testosterone, IGF-1s, and Protein Synthesis
  • Increases in Muscle Mass, Strength, and Pumps
  • Shredding of excess Fat
  • Increased Recovery and Growth
  • Increased Libido

Supplement Facts

Our Guarantee

All CATEGORY5™ products are manufactured in an UL NPA certified, FDA Inspected cGMP (Current Good Manufacturing Practice) certified facility. This ensures that our facilities comply with all Current Up To Date Food and Drug Administration regulations and requirements for the manufacturing of our supplements. Every single raw material used in our products is identity tested before production at a minimum and all finished products are submitted to rigorous quality control and assurance processes and procedures prior to being released to our Products. Guaranteeing the quality and safety of every bottle of CATEGORY5™ product continues to be at the core of our business and our vision.


*cGMP refers to the Current Good Manufacturing Practice regulations enforced by the US Food and Drug Administration (FDA). CGMPs provide for systems that assure proper design, monitoring, and control of manufacturing processes and facilities