Kaged Muscle

Ferodrox, 60 Vegetable Capsules

Helps Support Healthy Testosterone and Cortisol Balance*
Scientifically Proven Patented Ingredients to Support Natural Testosterone Production*
9.8 out of 10 (13 Reviews)
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60 Vegetable Capsules
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Product Overview

Kaged Muscle


  • Helps Maintain Testosterone Levels Within the Normal Healthy Range*
  • Helps Maintain Testosterone and Cortisol Ratio Within the Normal Healthy Range*
  • Increases Lean Muscle Mass and Strength*
  • Improves Stamina and Performance*
  • Helps Promote Optimal Recovery*
Kaged Muscle Ferodrox bottle


Tongkat Ali


Ashwagandha Extract


Purified Shilajit


Zinc Monomethionine





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, and heighten sex drive, maintaining a healthy testosterone to cortisol ratio is critical. The problem is, testosterone levels can fluctuate, whether due to age, stress, diet, or just regular, intense training protocols. It can be near impossible to gain power over these fluctuations with most other dietary supplements.

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, poorer quality, generic materials that have not been proven to be effective. This unethical and deceitful marketing practice is far too common in the dietary supplement industry, and allows companies to increase their profits while giving you inferior ingredients. Any brand claiming that these cheaper, lower quality ingredients are as safe and effective as those that have been clinically researched and patented, simply aren't being truthful.

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

Ferodrox's powerful matrix has six superior ingredients scientifically proven to amplify your results.*


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 peak 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 faster and more effectively you can bring cortisol under control the greater your total anabolic environment and better your recovery.*

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 by over 16% while testosterone levels increased by 37%!* Overall, the anabolic environment—using the ratio of circulating total testosterone compared to cortisol—improved by an incredible 36%.*[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 increase steadily.

LJ100 is the only Tongkat Ali clinically proven to maintain testosterone levels within the normal healthy range.* This powerful patented ingredient is backed by 13 human studies, and has proven efficacy and safety. 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 synergistically to help reinforce the powerful effects of LJ100 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 by more than 266% versus the placebo.*[5]

Research has also shown that supplementing with 600 mg of KSM-66 Ashwagandha daily can increase muscle mass, total testosterone, strength, reduce bodyfat[6], and enhance endurance[7].* In fact, supplementing with KSM-66 while also resistance training three times per week, for a period of 12 weeks, resulted in:

  • Up to 139% and 52% increases in bench press and leg strength*
  • Over 3% and 17% increases in chest and upper arm size*
  • More than 128% improvement versus placebo for change in bodyfat*
  • Over 15% increase in total testosterone*

KSM-66 is the world's most effective and pure, 100% organic certified Ashwagandha root extract in existence. It's derived from a proprietary alcohol and solvent-free, water extraction technology which results in a highly concentrated, full spectrum extract that preserves an optimally effective balance of natural constituents of the herb. In fact, KSM-66 has the highest percentage of naturally-occuring withanolides of root-only extracts available on the market, with more than 5% concentrations as measured by HPLC and negligible levels of the undesirable Withaferin A.

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


PrimaVie is a clinically studied, premium purified shilajit containing dibenzo-a-pyrones (DBPs), DBP-Chromoproteins (DCP), fulvic acid and 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 remedy of the ayurvedic and has been used for over 3,000 years as a rejuvenator and adaptogen in a variety of conditions.

Together, pure shilajit and Ashwagandha is a powerful combination. Historically, the combination has been used widely as an effective supplement to boost energy levels, and improve libido and overall health.* Ferodrox contains 200mg of PrimaVie purified shilajit to help amplify the effects of KSM-66 Ashwagandha and LJ100® Tongkat Ali, unlocking their powerful synergistic effects.*

PrimaVie purified shilajit extract is manufactured using state of the art chemical-free aqueous processing technology, to eliminate any impurities and maximize potency. In addition, PrimaVie® undergoes a proprietary process to remove harmful heavy metals and is GRAS affirmed and Proposition 65 compliant. Many other generic forms of shilajit have been found to contain high levels of arsenic and fail to meet the standards set out by Proposition 65.


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[7], immune system function[8,9], and protein synthesis[9]. The average person requires roughly 10-15mg of zinc daily to support crucial endocrine functions.* In fact, balancing micronutrient deficiencies 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 organically bound to methionine, has been scientifically proven absorbed better and sustain higher plasma levels compared to other zinc forms.*[10] 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. Research shows that DIM helps maintain estrogen levels within the normal healthy range, which in turn helps maintain testosterone levels within the normal healthy range.*

The Ferdrox 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 from starting materials that contain benzene, a toxic chemical compound that is a known carcinogen in high levels. The DIM used in Ferodrox has been thoroughly tested and proven to be benzene-free. Also, DIM consumed on its own or in regular capsule form, is ineffective. Ferodrox utilizes BioPerine black pepper extract and an innovative capsule technology that enhances the absorption and bioavailability of DIM.*


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

LJ100 13 Human Clinical Trials - Patent NO US 7,123,117 B2

With six high quality ingredients working synergistically to turn you into an unstoppable muscle building 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 advanced delivery technology. Engineered with superior delayed release vegetable capsules, the ingredients in Ferodrox's formula begin to shuttle into your system within 20 minutes of reaching the stomach.* Unlike traditional capsules, this unique delivery technology allows the ingredients in Ferodrox to bypass the stomach and be rapidly taken up into the small intestines.* This means there is less threat of Ferodrox's ferocious power being destroyed in the low pH (acidic) of the stomach. The extended action of the unique delivery technology significantly reduces ingredient degradation compared with conventional, immediate release capsules used for most other products.

With dramatically enhanced absorption, Ferodrox™ can permeate your cells and begin to help stimulate gains in size and strength from virtually every conceivable angle.* Never in bodybuilding has a vegetable capsule technology so advanced been used to deliver the superior 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. Choudhary, B., et al. Inter Quart J Res Ayurveda 2015; 36(1):63.
  7. Sandstead, H.H. J Lab Clin Med 1994; 124: 322.
  8. Solomons, N.W. Nutr Rev 1998; 56:27.
  9. Prasad, A.S. Nutr 1995; 11:93.
  10. Rosado J.L., et al. Nutr Res 1993; 13:1141.

Ratings & Reviews

Overall Rating
13 Ratings
Verified Buyer Rating
6 Ratings
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Verified Buyer
No written review.

This is the perfect test support product for me. I have levels checked regularly. Sometimes my estrogen levels are too high. In that case DIM/ASH combo usually does the trick. This has superior forms of both. Add in the longjack for a libido boost and shiljat which can improve energy and general well being this is a very good formula. That said, I don't believe in over the counter test boosters. This is a comprehensive formula designed to support normal testosterone function which I think is a great way of looking a market that is mostly hocus pocus.

Verified Buyer

I'm 43 and i've been using it for 6 weeks and i love it ! Helps with my recovery , muscle soreness , my mood of course my workouts !

Verified Buyer

Ok, used this for a month and after about 2 weeks I did have noticeable strength gains, energy seemed to stay the same, bedroom activities stayed about same, maybe little better. Recovery felt to stay the same as well. Is it worth it? Depends on your goals. I give it a 9 because there was a noticeable improvement but not something that I will do monthly. Not cost effective for me but I will probably use occasionally.


Never tried a testosterone supplement before, but this stuff has been awesome. In the first week I saw big changes in my strength and my alertness. I've used it for about a month now and feel wonderful everyday that I do and my strength in the gym has increased by quite a bit. I'm a customer for life thanks to the interest and care that kaged muscle provides and delivers in all their products.

Verified Buyer

As a 50 year-old guy, I’ve used a Testosterone Booster/balancer from another super-reputable brand for about a year and saw some improvement, but nothing compared to Fedorox. I’ve used it for a about a month and have started to lean out and recover faster than I ever have in my adult life. Six-pack, here I come!


Basically the most innovative test support product. I’ve taken test boosting products before and haven’t had results like this. Before my face would breakout and I wouldn’t feel much different in the gym or in the mornings. Every morning I’d wake up late, sleep through every single one of my alarms, without hearing a thing. But since I’ve started taking ferodrox the first thing I noticed is that I can finally wake up in the morning feeling ready for the gym, waking upon my first alarm taking my first dose of ferodrox, clean burn, and prekaged and hitting the gym. I’ve also noticed that despite dieting for upcoming competitions, my strength has not declined, suffered or even been maintained. In fact I’m noticing stronger lifts for more and more reps and I’m absolutely loving it. Thank you kris and thank you KM supps!


after running a 30 day cycle of FERODROX i was very pleased with the performance of the product! Kaged Muscle has really come through with an effective Test Booster...one they should be extremely proud of! ive run quite a few T-boosters in the past and FERODROX is easily one of my favorites. this combination of ingredients, in a totally transparent formulation, is designed to help you maintain testosterone levels within the normal healthy range. for guys my age this is of critical importance. after a couple weeks use i started to notice a boost in strength, energy and performance....this was evident both in the gym and out. ive used products containing Ashwagandha and Shilajit before and have found both to be beneficial but this was my first experience with Tongkat Ali....and i liked it! at about 60.00 for 30 servings... FERODROX isnt inexpensive, but quality doesnt come cheap and im seriously considering investing in a 60 day cycle soon. VERY nice product.


Week 2 on this product do feel the increase of energy without relying on caffeine in the morning. I have tried other testosterone support products aside for P6 this is my favorite and the price isnt bad.

Verified Buyer

Important to note that this does NOT increase testosterone, it only balances it out. With that being said, this stuff is FANTASTIC!!!! I feel incredible all day, and mainly when I'm working out. I'm pushing a lot more weight and reps. Add this along with all the other KM products and you can't lose!!!! Best company, best supps on the market today!!!!


During my 8 week trainer I have more energy in week 5 than I have in any previous trainers while taking this supplement. Down over 10 lbs and over 5 % bf, no brain fog, not tired or run down. I also don't have the normal irritability as I normally do on a carb/calorie depleted diet. I'm 42, in the gym for 2.5 hours a day now and feeling great. Highly recommend this product

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60 Vegetable Capsules
60 Vegetable Capsules
30 Servings | $1.97 Per Serving

What's in Kaged Muscle Ferodrox

Serving Size: 2 capsules
Servings Per Container: 30
Amount Per Serving % DV
Zinc (OptiZinc® [Zinc Monomethionine]) 30 mg 200%*
KSM-66® Ashwagandha Extract (Withania somnifera [root] standardized to 5% withanolides) 600 mg
LJ100® Eurycoma Longifolia Root Extract (standardized to contain 22% Bioactive Eurypeptides, 40% Glyco Saponins, 30% Polysacharides) 200 mg
PrimaVie® (Shilajit fulvic acid complex) 200 mg
Diindolymethane (MICROPURE®) 120 mg
BioPerine® (Piper Nigrum, fruit [standardized to min. 95% piperine]) 10 mg
* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Percent not established.
Other Ingredients:
Delayed Release Capsule Technology (Hypromellose, Gellan Gum), Rice Bran Extract, Maltodextrin, Rice Extract Blend (Rice Extract, Rice Hulls, Gum Arabic, Sunflower Oil), Rice Hulls, Natural Flavor, Silicon Dioxide, L-Methionine.

Directions For Ferodrox: Take 2 capsules in the morning or 1 capsule in the morning and 1 capsule in the afternoon, preferably with food. 

Warnings: Consult your physician prior to using this product if you are pregnant, nursing, under 18 years of age, taking medication or have a medical condition. Immediately discontinue use and contact your physician if any adverse reactions occur. Keep out of reach of children. Store in a cool, dry place away from excessive heat.

* 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.