Scientifically Proven Patented Ingredients to Support Natural Testosterone Production*

  • Powerful testosterone support
  • Science-backed ingredients
  • Transparent formula


  • Helps Maintain Testosterone Levels Within the Normal Healthy Range*
  • Helps Maintain Testosterone and Cortisol Ratio Within the Normal Healthy Range*
  • Supports Increases in Lean Muscle Mass and Strength*
  • Helps Promote An Anabolic Environment* 

There's no question that testosterone is the king of muscle building hormones. For anyone wanting to add size, boost strength and performance, lose fat, maintaining a healthy testosterone-to-cortisol balance is critical. The problem is, testosterone levels can fluctuate, whether due to age, stress, diet, or just regular, intense training protocols.

Always looking to push the scientific envelope, Kaged Muscle set out to create a holistic, yet effective, matrix that would precede the likes of anything before it.* More than two tireless years were spent working to unearth some of the most powerful ingredients the world had to offer.* Examining every bit of scientific data available, Kaged Muscle scientists combined six groundbreaking ingredients to ultimately formulate a matrix poised to change this supplement category forever.

Ferodrox™ is an industry breakthrough created to help you maintain testosterone levels within the normal healthy range.* Each ingredient was carefully selected and included in ultra-precise amounts to deliver unmatched results.* Unlike many other supplements on the market, the Ferodrox formula is fully disclosed, so you know exactly how much of each ingredient you're getting.

Our research team was tasked with sourcing the highest quality, patented ingredients backed by real science, with no cost limitations. In fact, some of the ingredients cost up to ten times more than the generic ingredients used by many of our competitors.

Many companies borrow claims from these premium patented ingredients, but use cheaper generic materials which have not been tested to be effective. This questionable marketing practice is far too common in the dietary supplement industry, and allows companies to increase their profits while giving you untested ingredients. Any brand claiming that these cheaper, lower quality ingredients are the same as those that have been scientifically researched and patented, simply aren't being truthful.

If your supplement isn't formulated with scientifically tested ingredients such as KSM-66®, LJ100®, PrimaVie®, and L-OptiZinc®, then it's time for a change.*




LJ100 Tongkat Ali, or Eurycoma longifolia, is the only science-based Eurycoma longifolia extract, standardized to contain not less than 22% bioactive "eurypeptides" and 40% glycosaponins. The bioactive "eurypeptides" are derived from the root of the plant. Co-discovered and -researched in collaboration with the esteemed Massachusetts Institute of Technology (MIT), the LJ100 patented Eurycoma has been shown to exert proandrogenic effects.*[1]

Each serving of Ferodrox delivers a powerful 200mg of LJ100 Tongkat Ali to encourage favorable hormone balance by combating cortisol and supporting optimal testosterone-to-cortisol ratio within the normal range.* Cortisol levels rise in response to frequent, intense training and other forms of physiological stress. Which, under healthy conditions, directly influences your body's testosterone response. The more effectively you can limit your cortisol, the better the conditions are for maintaining an anabolic environment.*

In a study published in the Journal of the International Society of Sports Nutrition, subjects with moderate stress supplemented with 200mg of LJ100. After four weeks, researchers measured stress hormones in the body and found that cortisol levels decreased while testosterone levels increased!* Overall, the anabolic environment—using the ratio of circulating total testosterone compared to cortisol—improved significantly.*[2]

Research is still unclear as to the precise molecular pathways and biochemistry, but evidence suggests that LJ100 may increase the bioavailability of testosterone by lowering the amount of sex hormone binding globulin, or SHBG, and reducing the conversion of testosterone to estrogen.*[3,4] Once you hit biological maturity at about age 30, SHBG begins to naturally increase.

LJ100 is the only Tongkat Ali scientifically shown to maintain testosterone levels within the normal healthy range.* This powerful patented ingredient is backed by multiple human studies, and has efficacy and safety evidence. Made from wild-crafted Tongkat Ali root from the rainforests of Malaysia, it's produced using a proprietary extraction technology.


KSM-66 Ashwagandha (Withania somnifera) root extract works as an adaptogen in maintaining cortisol levels within the normal healthy range.* The Ferodrox formula delivers a precise 600mg of KSM-66 Ashwagandha which has been scientifically shown to significantly lower serum cortisol levels.* In a randomized, double-blind, placebo-controlled study, researchers gave 64 subjects 600mg of KSM-66 or a placebo for eight weeks. At the end of the study, the KSM-66-supplemented individuals had decreased their cortisol levels significantly versus the placebo.*[5]

Research has also shown that supplementing with 600 mg of KSM-66 Ashwagandha daily can increase muscle mass, total testosterone, and strength, reduce bodyfat[6].* In fact, supplementing with KSM-66 while also resistance training three times per week, for a period of 12 weeks, resulted in:

  • Increases in bench press and leg strength*
  • Increases in chest and upper arm size*
  • Improvement versus placebo for change in bodyfat*
  • Increase in total testosterone within the normal healthy range*

KSM-66 is the world's best Ashwagandha root extract in existence. It's derived from a proprietary alcohol and solvent-free water extraction technology which results in a full spectrum extract. In fact, KSM-66 has the highest percentage of naturally-occurring withanolides of root-only extracts available on the market today, with more than 5% concentrations as measured by HPLC.

This cutting-edge, premium patented ingredient is backed by the most extensive research of any Ashwagandha available, cementing our decision to include it in the Ferodrox formula.


Not all Ashwagandha extract is created equal. Follow this guide to ensure you're getting a premium Ashwagandha extract supplement:

  • The Ashwagandha extract is drawn from roots alone and no leaf components have been added
  • The research studies are published in credible peer-reviewed, academic, and refereed journals such as those indexed on PubMed
  • A number of the published studies on Ashwagandha extract have been conducted on normal, healthy populations
  • The Ashwagandha extract is a full spectrum extract
  • The Withanolide content is high and the content assessment is by a valid and acceptable method capable of identifying the presence and quantity of the active molecule, such as through an HPLC validated method.


PrimaVie is a clinically studied, premium standardized shilajit containing over 40 different minerals. This powerful organo-mineral compound is obtained from sedimentary rocks in the Himalayan mountains at altitudes between 1000 and 5000 meters. Shilajit is an important tool of the ayurvedic and has been used for over 3,000 years as an adaptogen in a variety of situations.

Together, shilajit and Ashwagandha is a powerful combination.* Ferodrox contains 200mg of PrimaVie standardized shilajit to help support testosterone levels in the normal, healthy range.*

PrimaVie standardized shilajit extract is manufactured using state of the art chemical-free aqueous processing technology, to ensure you are getting consistent quality. In addition, PrimaVie® undergoes a proprietary purification process and is self-affirmed GRAS (Generally Recognized as Safe).


Zinc is one of 24 essential minerals; however, the body cannot synthesize its own, so it must be taken in via diet or supplementation. It plays a crucial role in enzymes[8] and is essential for supporting a normal anabolic environment. The average male requires roughly 15mg of zinc daily. In fact, balancing micronutrient intake is one of the key factors in maintaining testosterone levels within the normal healthy range.*

However, the benefits of this important mineral are dependent on the amount of zinc that is actually absorbed and utilized by the body. The zinc used in the Ferodrox formula is a highly absorbable and premium patented form of zinc. L-OptiZinc, which is zinc bound to methionine, has been scientifically shown to be absorbed better and sustain higher plasma levels compared to some other zinc forms.*[11] Ferodrox includes 30 mg of patented L-OptiZinc® zinc L-monomethionine in each daily serving.


3,3'-Diindolymethane, or DIM, is a powerful phytochemical derived from cruciferous vegetables such as cabbage, broccoli and cauliflower. Preliminary research suggests that DIM can help maintain estrogen levels within the normal healthy range, which in turn could help maintain testosterone levels within the normal healthy range.*

The Ferodrox formula contains 120mg of an ultrapure, bioavailable form of DIM. It's important to note that not all formulas using DIM are effective due to their sources or delivery methods. Some companies use low quality sources of DIM. The DIM used in Ferodrox has been thoroughly tested to be benzene-free.


Ferodrox contains 10mg of BioPerine®, a purified extract of black pepper, or 95% piperine, that works to help enhance absorption.* BioPerine® is the only piperine supplement to have undergone rigorous clinical evaluation to establish its safety and efficacy, and has obtained patented status.


With six high-quality ingredients working to help you turn into an unstoppable machine, Kaged Muscle researchers have created a monster with Ferodrox.* But Kaged Muscle scientists didn't stop at premium ingredients.

Ferodrox's powerful ingredients are unleashed with its precise delayed release vegetable capsule delivery technology.* Never in bodybuilding has a vegetable capsule technology so advanced been used to deliver the effects of such a revolutionary supplement.* 


1. Sambandan, T.G., Rha, C.K., Kadir A.A., Aminudim, N, Saad, J, Mohammed. M. Bioactive fraction of   Eurycoma longifolia. United States Patent 7,132,117. Issued November 7, 2006.

2. Talbott S., et al. J Inter Soc Sports Nutr 2013;10:28.

3. Henkel R.R., et al. Phytother Res 2014;28(4):544-50

4. Low, B.S., et al. J Ethnopharmacol 2013;149(1):201-7

5. Chandrasekhar, K., et al. Indian J Psychol Med 2012; 34(3):255.

6. Wankhede, S. et al. J Inter Soc Sports Nutr. 2012; 25(12):43.

7. Choudhary, B., et al. Inter Quart J Res Ayurveda 2015; 36(1):63.

8. Sandstead, H.H. J Lab Clin Med 1994; 124: 322.

9. Solomons, N.W. Nutr Review 1998; 56:27.

10. Prasad, A.S. Nutr 1995; 11:93.

11. Rosado J.L., et al. Nutr Res 1993; 13:1141.

*These statements have not been evaluated by the Food and Drug Administration.  This product is not intended to diagnose, treat, cure, or prevent any disease.

Customer Reviews

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Paolo M.


My status: I am 34 years old, luckily I have very low stress levels, I can follow my balanced diet and I can sleep very well. I wanted to give a try to Ferodrox. So I did my blood tests before and after 1 month of Ferodrox. Before using Ferodrox my testosterone level was perfectly fine within the normal range for my age. My testosterone level basically did not change after Ferodrox. My considerations: I think my age and my good health played a BIG role in this result. Probably older people than me could get more benefits from Ferodrox. I think that if you have low testosterone levels for your age you could consider using Ferodrox (or ask for medical advice). I also think Ferodrox could help if you are very stressed or you don't sleep enough/well. Its ingredients also have a soporific effect so using it also before sleep could help. At the moment I will not use Ferodrox again, but I will monitor my testosterone levels now and then and maybe I will give it a new try in the future if the levels will fall down.


Hi Paolo, Thank you for your honest review. It was smart of you to get your blood tested before and after the use of Ferodrox. Ferodrox does not affect everyone at the same rate. Ferodrox is meant to optimize your testosterone levels for your specific body. As you said, you are in good health and at a prime age so you might already have optimal testosterone levels. Contact our support team at supprt@kagedmuscle.com and let them know of your experience. They will be more than happy to help. Best, Ryan

Robert A.


I've tried many "Test Boosters" in the past from very top brands with nothing resulting... Some say it depends on you and the product... Well for me this is the only product where I have actually noticed a difference in performance and physical capability! It's no wonder pile but when you add to your already kick *** workout and lifestyle it only makes you better!!!


Thank you so much for the awesome review, Robert! We are thrilled to hear you've seen results in and out of the gym with our Ferodrox! We are confident this will continue! Keep crushing it at the gym and thank you for being apart of the Kaged Muscle family!

Bernard N.

I think it might

It may be kinda doing something not sure but only been 3 wks so may be to soon


Thank you so much for the review Bernard! With our Ferodrox, you will start to notice results as the week progresses onward. Plus, when you are on a diet and training plan, you will start to notice more and better results as you continue on with the Ferodrox. Thank you for the support and being apart of the Kaged Muscle family!

Cameron G.

One week in and not much yet

I've only been taking ferodrox for about a week . No noticeable difference yet but I have confidence by the time I finish a full cycle there will be definite benefits, as there are with all kaged muscle products


Hey Cameron, Thank you so much for your review! As Ferodrox is a testosterone support supplement, it may take time to notice the results. Rest assured, it surely is a great supplement and one I'm sure you will notice sooner than later! - Ryan

Elton A.

Good for what it is

I have been using Ferodrox for a few months now and am happy with it. I found the best time with it is at the end of month 1, but it feels as though it is tapering off now in its effectiveness. As such I'll cycle off now for about 6 weeks and come back to it. I would say I've felt more level on it and gains in the gym seems to be more with fat loss than muscle gain. Overall I am happy with it as a product and would recommend to older men (I am 38) as means of getting a bit of your youth back.


Thank you so much for your review Elton! We're very happy to hear that you're enjoying Ferodrox. If you have any issues what so ever with our products, please contact our support team at support@kagedmuscle.com so they can assist you in any way possible!

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