originally published May 2017 – updated July 2025

It’s time to awaken the giant within you.

Monster Plexx by Innovative Labs (acquired by Hi-Tech Pharmaceuticals in 2015) is a prohormone supplement that’s been on the prohormone scene for a while. When it first came out it was one of the first quad stacks on the market. 

The new and improved version of Monster Plexx is even more powerful, thanks to the revolutionary Cyclosome technology — an innovation that makes this stack even more effective than the original formula. Monster Plexx has some very exciting benefits, such as:

• Intense muscle and strength gains
• Boosts libido
• Improves muscle recovery
• Increases testosterone
• Burns fat and reduces water retention

If you want to look like the Hulk, minus the green skin, Monster Plexx is what you need. Its powerful blend of five anabolic compounds means your hormone levels are consistently peaking, so you don’t have to worry about timing your doses. Easy to use, and it gets results? We’re in!

Monster Plexx Ingredients

The power of Monster Plexx is in its cutting-edge, patented ingredients. The blends below can provide massive gains in strength and lean muscle mass. 

This formula contains esters, which eliminate the need to time your doses. Esters control the release of the ingredients below, so hormones and testosterone are always running. 

Monster Plexx also contains milk thistle, a natural herbal remedy that cleans and protects the liver.

Quintuple Prohormone & Anabolic Blend

No doubt about it; five prohormones is aggressive. But if you’re reading this, chances are you want something that can get you serious results. You want to get the best bang for your buck out of your prohormone stack. 

Here are the key ingredients in this blend and what they do:

1-Andro (1-DHEA): This compound is seven times more anabolic than testosterone. It prevents water retention by not converting into unwanted estrogen. Muscle gains are dry and easy to maintain after post-cycle therapy, thanks in part to this prohormone.

4-Andro (4-DHEA): Converts to the hormone testosterone. 4-Andro also increases red blood cell count, which improves muscle pumps during workouts and aids protein synthesis. This compound gets you strong and big.

Epiandrosterone: A derivative of DHEA, this ingredient is a precursor to stanolone, a.k.a. DHT. DHT promotes better mood, increased sex drive, improves strength and muscle mass, helps shed excess fat, and prevents water retention.

Plant Androgenic & Anabolic Blend

Monster Plexx’s Plant Androgenic & Anabolic Blend features potent ingredients designed to trigger the body’s own hormone pathways, giving you a performance edge in strength, size, and recovery. Here’s a key ingredient in the formula:

Doisterol: Stimulates the production of a leutinizing hormone (LH), which helps the body produce and maintain testosterone. As LH increases, testosterone increases in tandem.

Blend with Cyclosome Technology

Cyclosome® technology is the most advanced oral administration technology in the supplement industry to date. It solves the common problem of testosterone-boosting compounds and legal prohormones being poorly absorbed by the body. 

With this innovation, prohormones are now efficiently and effectively absorbed, providing better results for you. Here are the ingredients behind in this powerful blend:

Ajuga Turkestanica Extract: Improves athletic performance, increases strength and endurance, maintains muscle mass, and builds muscle and other tissues.

5-Methyl-7-Methoxyisoflavone and Pine Pollen 100:1 Extract: These two compounds assist in protein synthesis, which helps maximize the effectiveness of the anabolic and androgenic ingredients in Monster Plexx.

Cyclosome® technology is like a Trojan horse. It sneaks through the liver—bypassing the first-pass effect, which renders active compounds useless—and delivers prohormones and testosterone boosters to the cardiovascular system where they can get to work. 

By creating this safe passage through the body, compounds can be utilized by the body without being changed. Hi-Tech Pharmaceuticals is one of the few companies to have access to this breakthrough technology.

Who Should Take Monster Plexx

Monster Plexx is a powerful supplement, and that power must be respected. That being said, it is not for beginners, and maybe not even for intermediate-level weight lifters. We recommend this prohormone supplement for: 

• Competitive athletes and bodybuilders
• Adult men over the age of 21

To prevent developing some less-than-desirable side effects, we recommend women check out AbNORmal by Blackstone Labs as an effective Monster Plexx alternative.

Warning: Do not take Monster Plexx if you’re subject to any sports drug testing, because you may fail the test. In this case, try to avoid prohormone supplements, which will keep you out of trouble. 

How to Take Monster Plexx for Best Results

Monster Plexx offers the best results when cycled for eight weeks at a time. Take two tablets per day, six to eight hours apart. Patience is key. For some users it takes up to two weeks to see results, but once it starts working you’ll get crazy momentum.

Monster Plexx requires good on-cycle and post-cycle support. We recommend the following on-cycle and post-cycle therapy supplements to get the most out of this powerful supplement:

• Cycle Assist: An on-cycle support supplement that supports blood pressure, joints, prostate, and liver health.
• Arimigen: A post-cycle support that amplifies testosterone while minimizing estrogen, helping you maintain your hard-earned gains.

Frequently Asked Questions About Monster Plexx

What does a prohormone do?

Prohormones help your body increase testosterone levels naturally, leading to improved muscle growth, strength, and recovery.

Do I need PCT after using Monster Plexx?

Yes. A proper Post Cycle Therapy (PCT) is crucial to restore hormone balance and maintain the results of your cycle.

What makes Monster Plexx different from other prohormones?

Monster Plexx combines five anabolic compounds and uses ester delivery technology for better absorption, longer activation, and serious gains.

Next Steps: Buy Monster Plexx at Black Diamond Supplements 

If you’re ready to unleash your inner Hulk, then you need Monster Plexx from Black Diamond Supplements. 

Don’t forget your on-cycle and post-cycle supplements while you’re at it. Then, prepare to max out those pumps and build more muscle than ever before!

For more information on prohormones and what they can do for you, take a look at our article What Are the Benefits of Taking Prohormones?.