THE SCIENCE BEHIND THE STACK

The research behind every milligram in Inner Warrior.

13 ingredients, dosed at research-backed levels, mapped across four pathways your body actually uses to make, free, protect, and use testosterone.

3rd party lab tested GMP certified facility 13 active ingredients No proprietary blends

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HOW TO READ THIS PAGE

Every citation on this page points to research on an individual ingredient, not Inner Warrior itself. We list real studies, dose ranges, and limitations. Where human data is limited (a few of the newer botanicals), we say so plainly instead of dressing up animal research as human proof.

WHY ANY OF THIS MATTERS

Men's testosterone has been dropping for generations.

Population data from four large studies across three continents shows a steady downward trend in serum testosterone over the last 50 years, independent of aging. The cause is environmental, nutritional, and lifestyle, not your age.

1987 to 2004 ~1% / yr

Massachusetts Male Aging Study

American men sampled over 17 years showed a steady ~1% annual decline in serum testosterone that could not be explained by aging alone. Same men, different decades, lower numbers.

Travison TG et al., 2007 J Clin Endocrinol Metab

Birth 1940s vs 1960s Cohort drop

Danish cross-generational study

Danish men born after 1960 had significantly lower serum testosterone than men born before 1940, even after adjusting for age at testing. The drop tracked the birth year, not the lifespan.

Andersson AM et al., 2007 J Clin Endocrinol Metab

1972 to 2002 -3 ng/dL/yr

Finnish working-age men

Across three decades, average serum testosterone in Finnish men of working age fell by roughly 3 ng/dL per year, with the decline holding across socioeconomic groups.

Perheentupa A et al., 2013 Eur J Endocrinol

1999 to 2016 -25%

US men aged 15 to 39

NHANES data on young American men showed mean serum testosterone fell from roughly 605 ng/dL in 1999 to 2000 to roughly 451 ng/dL in 2015 to 2016. Young men, not old men, and still dropping fast.

Lokeshwar SD et al., 2021 Eur Urol Focus

WHY STACK

Alone vs together.

No single trial tests the exact 13-ingredient Inner Warrior formula. What ingredient research does show is that the pathways interact: production, free T, recovery, and cofactors each move differently when the others are present.

TONGKAT + FADOGIA

Production stack

ALONE

Tongkat Ali has RCT support for total and free testosterone in men. Fadogia is much earlier in the research curve, with mostly animal and mechanistic data.

Tambi 2012 (Tongkat)

TOGETHER

Tongkat works downstream by helping free testosterone the body already makes. Fadogia is proposed to act upstream on signaling. Pairing them addresses both ends of the production pathway.

Pathway logic

FJOR take We will not claim a Tongkat + Fadogia combination trial. We pair them because the ingredient research suggests they act at different points in the same system.

TURKESTERONE + MAGNESIUM

Strength and recovery

ALONE

Magnesium has trial support for strength and free testosterone in athletes. Turkesterone has mechanistic and animal data on protein synthesis, with limited modern human RCTs.

Cinar 2011 (Mg)

TOGETHER

Turkesterone is studied as a non-hormonal anabolic support. Magnesium helps the sleep, recovery, and mineral balance that lifting actually depends on.

Recovery stack

FJOR take Turkesterone is interesting research, not a finished story. We dose at 400mg of 20% ajuga extract and pair it with mineral support so training and recovery move together.

ZINC + D3 + K2

Cofactor foundation

ALONE

Zinc restored testosterone in deficient older men (Prasad). Vitamin D3 raised total testosterone in men supplementing for a year (Pilz). K2 routes calcium and pairs with D3 for bone and cardiovascular markers.

Prasad 1996 / Pilz 2011

TOGETHER

Most men under-eat at least one of these. Stacking them covers the cofactor floor that single-herb bottles ignore.

Cofactor logic

FJOR take This trio is the boring part of the formula, and the part that makes the rest of it work.

BORON + FULL STACK

Trace support for free T

ALONE

A small human trial in men showed that 10mg of boron daily for a week increased free testosterone and lowered SHBG and estradiol (Naghii).

Naghii 2011

TOGETHER

Boron makes more of the testosterone that is already produced biologically available. It works best when the rest of the stack is also supporting production.

Free T pathway

FJOR take Boron alone is a small lever. Boron paired with the rest of the stack is the lever that finishes the work.

SHILAJIT + MCT

Energy and resilience

ALONE

Purified shilajit at 250mg twice daily, 90 days, raised total testosterone, free testosterone, and DHEAS in healthy men (Pandit). MCT oil is studied as a clean, fast-use energy carrier.

Pandit 2016 (Shilajit)

TOGETHER

Shilajit delivers fulvic minerals and trace nutrients. MCT helps carry fat-soluble actives and provides a cleaner daily energy substrate. They support resilience from different angles.

Energy pathway

FJOR take Shilajit is one of the stronger human-trial actives in the formula. We pair it with MCT so the rest of the bottle absorbs better and the day feels steadier.

FOUR PATHWAYS

How testosterone actually moves through the body.

Inner Warrior is built around four levers your body uses every day: producing testosterone, freeing what is already bound, protecting it from stress and oxidation, and giving the cofactors needed to use it.

PRODUCE

Make more, naturally

Upstream signaling and Leydig-cell support. The half of the stack focused on the body producing testosterone rather than replacing it.

Tongkat Ali Fadogia Coleus Forskohlii Shilajit

FREE

Make it available

Testosterone is only useful when it is unbound. This pathway supports free T by influencing SHBG, estrogen balance, and conversion enzymes.

Boron Zinc

PROTECT

Defend the engine

Oxidative stress, training load, and poor recovery quietly drag testosterone down. This pathway supports cell defense, recovery, and an anabolic environment.

Astaxanthin Magnesium Turkesterone

OPTIMIZE

Cofactors and delivery

The vitamins, minerals, and lipid carriers your body needs to actually use the hormones it produces. Most single-herb bottles ignore this layer.

Vitamin D3 Vitamin K2 Vitamin B12 MCT Oil

INGREDIENT LIBRARY

All 13 ingredients. All the receipts.

Each card lists the exact dose in Inner Warrior, the role it plays, the mechanism, and the research we relied on. Editors can attach study URLs in admin so visitors can read sources directly.

01 Produce + Free T

Tongkat Ali

600 mg

200:1 Longjack root extract

Helps support free testosterone the body already produces.

Studied for supporting lower SHBG activity so more testosterone remains biologically available. Used traditionally for male vitality and training output.

Tambi MI et al., 2012 Andrologia

In 76 men with low testosterone, 200mg per day of standardized Tongkat extract for one month was associated with significantly higher serum testosterone and improved hormonal status.

Henkel RR et al., 2014 Phytotherapy Research 28:544 (Wiley)

Physically active seniors taking 400 mg of standardized Physta Tongkat extract showed gains in muscular force, free testosterone, and fatigue markers.

Honest note. Inner Warrior carries 600 mg of 200:1 Longjack root extract. Most published human trials used 200 to 400 mg of standardized Physta water extract or LJ100. The studies cited here describe ingredient research at those doses; treat them as background, not a direct effect-size match to this exact extract.

02 Produce

Fadogia Agrestis

400 mg

30:1 stem extract

Discussed in research for upstream testosterone signaling.

Proposed to act on LH signaling and Leydig-cell activity, the upstream route the body uses to produce testosterone.

Yakubu MT et al., 2008 Asian Journal of Andrology

In a rodent model, Fadogia aqueous extract was associated with increased serum testosterone and changes consistent with androgenic activity.

Honest note. Animal research only. As of this writing, there are no published human placebo-controlled trials of Fadogia Agrestis for testosterone or training outcomes. We dose at 400 mg of 30:1 extract because that is the range discussed in current ingredient research, not because a finished human trial supports a specific effect.

03 Protect + Recovery

Turkesterone

400 mg

20% Ajuga turkestanica extract

An ecdysteroid researched at the mechanism level for protein synthesis and recovery.

Ecdysteroids are studied in cell and animal models for their influence on protein synthesis pathways without binding androgen receptors. The human picture is still being mapped.

Syrov VN, 1976 Farmakologiia i Toksikologiia

Early ecdysteroid research reported anabolic-type effects on muscle tissue in animal models without androgen receptor activation.

Isenmann E et al., 2019 Archives of Toxicology

Review of ecdysteroid evidence, including human strength training, noted potentially supportive effects on performance while flagging the need for placebo-controlled human trials.

Honest note. A recent placebo-controlled human pilot found no significant strength or testosterone benefit from 500 mg per day of turkesterone over 4 weeks. We include it for its ecdysteroid mechanism in recovery research, not as a finished anabolic claim. If you want a guaranteed strength outcome from this single ingredient, the published human data does not support that yet.

04 Produce + Optimize

Coleus Forskohlii

200 mg

20% Forskolin root extract

Supports cAMP signaling tied to hormonal output and body composition.

Forskolin is a cAMP activator. cAMP is the cellular messenger linked to hormonal signaling, fat metabolism, and lean body composition.

Godard MP et al., 2005 Obesity Research

In overweight and obese men, 250mg of 10% forskolin twice daily for 12 weeks was associated with a decrease in body fat percentage and an increase in serum free testosterone and lean body mass.

Honest note. The Godard trial was run in overweight and obese men, so the body-composition and free-T effects are reported in that specific cohort. We include forskolin for cAMP signaling support across body composition; we do not project the same effect sizes onto men already lean.

05 Produce + Energy

Shilajit

200 mg

50% Fulvic acid

Mineral-rich support for cellular energy and male vitality.

Delivers fulvic acid and trace minerals tied to mitochondrial energy, male fertility markers, testosterone status, stamina, and resilience under stress.

Pandit S et al., 2016 Andrologia

In 96 healthy men aged 45 to 55, 250mg of purified shilajit twice daily for 90 days was associated with significant increases in total testosterone, free testosterone, and DHEAS versus placebo.

Keller JL et al., 2019 Journal of the International Society of Sports Nutrition

Shilajit supplementation at 500 mg per day alongside resistance training showed support for muscular strength and fatigue resistance over an 8-week protocol.

Honest note. Pandit 2016 used 250 mg twice daily of purified shilajit; Keller 2019 used 500 mg per day. Inner Warrior carries 200 mg of 50% fulvic acid shilajit per serving. The studies cited describe ingredient research at the doses tested, which are higher than this serving.

06 Optimize

MCT Oil

200 mg

Medium-chain triglyceride powder

Lipid carrier that supports absorption and clean daily energy.

Medium-chain triglycerides are fast-use lipids the body can pull on for energy. They also help carry fat-soluble actives like D3 and K2.

St-Onge MP, Bosarge A, 2008 American Journal of Clinical Nutrition

A 16-week trial comparing MCT to long-chain triglycerides showed support for body composition changes when MCT replaced equivalent calories.

Honest note. We do not pitch MCT as a testosterone booster. It is a delivery and energy ingredient. Its role in this formula is carrier support.

07 Protect + Free T

Magnesium

200 mg

Glycinate form (48% DV)

Supports deep sleep, recovery, and free testosterone availability.

Magnesium is a cofactor in hundreds of enzymatic reactions, including those that influence SHBG binding and the sleep architecture testosterone depends on.

Cinar V et al., 2011 Biological Trace Element Research

In sedentary and athletic men, 4 weeks of magnesium supplementation was associated with higher total and free testosterone, with the largest changes in men who were also training.

Excoffon L et al., 2009 Journal of the American Geriatrics Society

In older men, higher serum magnesium correlated with higher total testosterone and anabolic hormone status.

08 Free T + Optimize

Zinc

15 mg

Picolinate form (136% DV)

Essential cofactor for testosterone metabolism and immune function.

Zinc is a structural cofactor in enzymes tied to androgen metabolism. Marginal zinc status is associated with lower testosterone in men.

Prasad AS et al., 1996 Nutrition

Marginal zinc deficiency in healthy adult men was associated with reduced serum testosterone. Six months of zinc supplementation in older men with low levels was associated with restored testosterone status.

Netter A et al., 1981 Archives of Andrology

In infertile men, zinc supplementation was associated with increases in testosterone and improvements in sperm count.

09 Protect

Astaxanthin

12 mg

Carotenoid antioxidant

Carotenoid antioxidant for oxidative defense and recovery support.

A potent carotenoid antioxidant studied for its ability to neutralize free radicals and support cellular defense from training and environmental oxidative stress.

Earnest CP et al., 2011 International Journal of Sports Medicine

Astaxanthin supplementation in trained cyclists was associated with improvements in metabolic substrate use during endurance work.

Park JS et al., 2010 Nutrition and Metabolism

Astaxanthin supplementation in healthy adults was associated with reduced markers of oxidative stress and supported immune cell activity.

Honest note. We include astaxanthin as an oxidative-defense ingredient, not as a standalone testosterone driver. Older sperm-parameter trials often paired astaxanthin with other actives like saw palmetto, so they describe the combination, not astaxanthin alone.

10 Free T

Boron

6 mg

Citrate form

Supports free testosterone availability and estrogen balance.

Boron influences how testosterone binds in the body, supporting more free testosterone, balanced estradiol, and lower SHBG.

Naghii MR et al., 2011 Journal of Trace Elements in Medicine and Biology

In 8 healthy men, 10mg of boron daily for one week was associated with a significant increase in free testosterone and decreases in SHBG and estradiol.

Pizzorno L, 2015 Integrative Medicine

A clinical review of boron in human nutrition noted support for free testosterone, bone, and inflammatory markers at modest daily intakes.

11 Optimize

Vitamin B12

1000 mcg

Methylcobalamin (active form)

Supports energy, nerve function, and mental clarity.

Methylcobalamin is the active form of B12, used by the body for red blood cell formation, nerve health, and cellular energy production.

Stabler SP, 2013 New England Journal of Medicine

Clinical review of B12 deficiency described impacts on energy, mood, and cognition, with restoration of these markers after sufficient B12 intake.

Honest note. B12 is included as a foundational energy and nerve cofactor. It is not pitched as a testosterone booster. Methylcobalamin is the form many men absorb more readily than cyanocobalamin.

12 Optimize + Produce

Vitamin D3

4000 IU

Cholecalciferol (500% DV)

Foundational hormone-pathway cofactor for testosterone, bone, and immune function.

Vitamin D3 acts on receptors throughout the body, including tissues involved in hormone regulation, immune function, and bone metabolism.

Pilz S et al., 2011 Hormone and Metabolic Research

In men with insufficient baseline vitamin D supplementing roughly 3,332 IU daily for one year, significant increases in total, bioactive, and free testosterone were observed versus placebo. Men already at sufficient D may see smaller effects.

Wehr E et al., 2010 Clinical Endocrinology

Vitamin D status was positively associated with total testosterone, free testosterone, and bioactive testosterone in adult men. The relationship is strongest where baseline D is low.

Honest note. Most of the D3-and-testosterone signal in the literature comes from men whose baseline vitamin D was insufficient. The 4000 IU dose is a maintenance level and is most useful for men who do not get consistent sun exposure or dietary D.

13 Optimize

Vitamin K2

200 mcg

MK-7 form (167% DV)

Routes calcium toward bones and pairs with D3 for long-term performance support.

K2 MK-7 activates proteins that direct calcium into bone and away from soft tissue, supporting bone density and cardiovascular markers when paired with D3.

Knapen MH et al., 2013 Osteoporosis International

Three years of 180mcg per day of MK-7 supported bone mineral density and bone strength markers in postmenopausal women.

Schwalfenberg GK, 2017 Journal of Nutrition and Metabolism

Review of vitamin K2 in human health noted support for cardiovascular and bone outcomes, with stronger effects when K2 is combined with vitamin D.

Honest note. Most testosterone-related K2 research is in MK-4 animal models. Inner Warrior uses MK-7, the form best absorbed by humans for bone and calcium routing. We include K2 as D3's calcium partner, not as a direct testosterone claim.

READY TO RUN THE STACK

Now you know what is in the bottle. Try it for 90 days.

If Inner Warrior doesn't change how you feel inside 90 days, email us. Refund on the full purchase, even on empty bottles.

$29.99 per month on subscribe 90-day money-back guarantee

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Statements on this page describe ingredient research and traditional use. They are not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Consult your physician before starting any supplement, especially if you are on medication or have a medical condition.