THE PROBLEM

Same age does not equal same testosterone.

Across 1,064,891 men and five decades of data, testosterone kept falling, even after adjusting for age and weight.¹ Something changed in our environment.

Testosterone · C₁₉H₂₈O₂

SAME AGE. DIFFERENT DECADE.

TESTOSTERONE ACROSS THE DECADES

A ~40% drop in 25 years⁴

1 in 5

Young men have low testosterone.⁴^,⁵

2 in 3

Men 30 to 44 have sub-optimal testosterone ⁴⁶

~1-2% every year

The drop of testosterone, on top of normal aging.²

THE SIGNS

HOW LOW TESTOSTERONE SHOWS UP

Low testosterone rarely shows up as one big thing. It shows up as a lot of small ones.

Tired by 2 p.m.
Less interest in the bedroom.
Belly fat that won't budge.
Strength that stalls.
Less muscle for the same work.
Low mood.
Motivation on mute.

Signs drawn from the HIM study⁶ and the JAMA sleep study.⁷

These signs have plenty of other causes. A blood test is the only way to know your number.

HOW TO INCREASE TESTOSTERONE

THE DAILY FIVE

01SLEEP

Get 7-9 hours of sleep.⁴⁸

Short sleep hits testosterone fast.

02FOOD

Eat real food.

Real food. Not ultra-processed.

03MOVEMENT

Move more.

Physical activity raises testosterone.

04COMMUNITY

Less stress. More connection.

Stress hormones work against testosterone.

05SUPPLEMENTS

Fill the gaps.

Most men are nutrient deficient and optimizing their supplement stack.

THE FORMULA

This is why we built SuperFuel™

Science-backed ingredients so that your body has everything to make testosterone. No needles. Two capsules.

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The SuperFuel tin with two capsules in front of it on an off-white sweep

Ashwagandha root extract · 5% withanolides

600 mg

Lowers cortisol, your main stress hormone.

Fenugreek seed extract · 50% saponins

600 mg

Slows the enzymes that convert testosterone away.

Tongkat ali root extract · 0.8% eurycomanone

100 mg

Supports testosterone production.

Multivitamin

10 nutrients

The raw materials.

Plus 50 mg natural caffeine from green coffee bean extract, about half a cup of coffee, so the habit sticks. And 5 mg black pepper extract (95% piperine) to help absorption.

2 capsules daily · 2-in-1 solution · Every dose on the label

THE MECHANISM

How SuperFuel™ works

Unlike other boosters, SuperFuel™ supports testosterone in 3 ways at once.

01
DECREASES CORTISOL

Cortisol, your main stress hormone, suppresses testosterone.²² Ashwagandha lowered cortisol 27.9% in 60 days, more than placebo.²³
02
INCREASES TESTOSTERONE

Tongkat ali and ashwagandha help your body make more of its own.²⁴^,³² Production also depends on raw materials: the multivitamin layer supplies zinc, vitamin D3 and boron, plus other nutrients men often fall short on.¹⁰^,¹³
03
BLOCKS ESTROGEN

Fenugreek slows aromatase and 5-alpha-reductase, the enzymes that convert testosterone into estrogen and DHT, so more of it stays free. In one trial, free testosterone rose 98.7% from baseline on fenugreek vs. 48.8% on placebo.²⁵

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OUR STANDARD

HOW WE BUILT SUPERFUEL™

Four rules so you never have to guess.

01
Only what's proven in humans.
02
Real, potent ingredients, dosed to the studies.
03
Tested clean.
Third-party tested, with botanical extracts screened for heavy metals. Made in the USA in a cGMP-certified, FDA-registered, NSF-registered facility.
- Third-party tested
- cGMP
- FDA-registered facility
- NSF-registered facility
- Made in the USA
04
Built to absorb. Built to stick.

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THE CUT

Most ingredients didn't make the cut

Every ingredient had to earn its spot. These didn't.

POPULAR T-BOOSTER INGREDIENTS

Tribulus terrestris
Reviews found it doesn't raise testosterone in humans.²⁷
Turkesterone
No significant effects in recent human trials.²⁸^,²⁹
Fadogia agrestis
Rat studies only.³⁰ No human trials.
Bulbine natalensis
No human trials. No human safety data.
Maca
Testosterone didn't budge vs. placebo in a 12-week trial.
Shilajit
Only two human studies. Not enough.
DIM
Too few studies to back a claim.
L-carnitine
No direct link to testosterone.

THE RESEARCH

The benefits With receipts

Every row is a double-blind, placebo-controlled human trial of an ingredient in SuperFuel™. The dose column shows what each study used.

Ingredient (dose studied)	Study	Who, how long	Result
Ashwagandha, 600 mg	Wankhede 2015³²	57 men, 8 weeks of training	Total testosterone +96 ng/dL vs. +18 on placebo
Fenugreek, 600 mg	Wankhede 2016²⁵	60 men, 8 weeks of training	Free testosterone +98.7% from baseline vs. +48.8% on placebo
Fenugreek, 600 mg	Rao 2016³³	120 men, ages 43 to 70, 12 weeks	Total and free testosterone rose vs. placebo
Tongkat ali, 100 mg	Chinnappan 2021⁴⁵	105 men, ages 50 to 70, 12 weeks	Total testosterone higher than placebo at week 12

Ashwagandha, 600 mg

Study: Wankhede 2015³²
Who, how long: 57 men, 8 weeks of training
Result: Total testosterone +96 ng/dL vs. +18 on placebo

Fenugreek, 600 mg

Study: Wankhede 2016²⁵
Who, how long: 60 men, 8 weeks of training
Result: Free testosterone +98.7% from baseline vs. +48.8% on placebo

Fenugreek, 600 mg

Study: Rao 2016³³
Who, how long: 120 men, ages 43 to 70, 12 weeks
Result: Total and free testosterone rose vs. placebo

Tongkat ali, 100 mg

Study: Chinnappan 2021⁴⁵
Who, how long: 105 men, ages 50 to 70, 12 weeks
Result: Total testosterone higher than placebo at week 12

Ingredient (dose studied)	Study	Who, how long	Result
Ashwagandha, 600 mg	Chandrasekhar 2012²³	64 stressed adults, 60 days	Cortisol down 27.9%, more than placebo. Stress scores improved
Ashwagandha, 250 or 600 mg	Salve 2019³⁴	58 adults, 8 weeks	Perceived stress fell at both doses. Cortisol fell at 600 mg
Tongkat ali, 200 mg (2x SuperFuel™'s dose)	Talbott 2013²⁴	63 stressed adults, 4 weeks	Cortisol down 16%. Salivary testosterone up 37%

Ashwagandha, 600 mg

Study: Chandrasekhar 2012²³
Who, how long: 64 stressed adults, 60 days
Result: Cortisol down 27.9%, more than placebo. Stress scores improved

Ashwagandha, 250 or 600 mg

Study: Salve 2019³⁴
Who, how long: 58 adults, 8 weeks
Result: Perceived stress fell at both doses. Cortisol fell at 600 mg

Tongkat ali, 200 mg (2x SuperFuel™'s dose)

Study: Talbott 2013²⁴
Who, how long: 63 stressed adults, 4 weeks
Result: Cortisol down 16%. Salivary testosterone up 37%

Ingredient (dose studied)	Study	Who, how long	Result
Ashwagandha, 600 mg	Wankhede 2015³²	57 men, 8 weeks of training	Bench press +46 kg vs. +26 kg on placebo
Fenugreek, 600 mg	Rao 2020³⁵	138 men, ages 25 to 47, 8 weeks	Leg press +20.7 kg vs. +10.6 kg on placebo
Ashwagandha, 500 mg	Choudhary 2015³⁶	50 athletic adults, 12 weeks	VO2 max +8.4% at 8 weeks and +9.1% at 12, significant vs. placebo
Ashwagandha, 600 mg	Tiwari 2021³⁷	50 athletic adults, 8 weeks	VO2 max +10% vs. placebo. Better recovery scores
Fenugreek, 500 mg	Poole 2010³⁸	49 trained men, 8 weeks	Strength and body composition improved vs. placebo

Ashwagandha, 600 mg

Study: Wankhede 2015³²
Who, how long: 57 men, 8 weeks of training
Result: Bench press +46 kg vs. +26 kg on placebo

Fenugreek, 600 mg

Study: Rao 2020³⁵
Who, how long: 138 men, ages 25 to 47, 8 weeks
Result: Leg press +20.7 kg vs. +10.6 kg on placebo

Ashwagandha, 500 mg

Study: Choudhary 2015³⁶
Who, how long: 50 athletic adults, 12 weeks
Result: VO2 max +8.4% at 8 weeks and +9.1% at 12, significant vs. placebo

Ashwagandha, 600 mg

Study: Tiwari 2021³⁷
Who, how long: 50 athletic adults, 8 weeks
Result: VO2 max +10% vs. placebo. Better recovery scores

Fenugreek, 500 mg

Study: Poole 2010³⁸
Who, how long: 49 trained men, 8 weeks
Result: Strength and body composition improved vs. placebo

Ingredient (dose studied)	Study	Who, how long	Result
Fenugreek, 600 mg	Rao 2020³⁵	138 men, 8 weeks	Lean mass +1.8% vs. +0.5% on placebo
Fenugreek, 600 mg	Wankhede 2016²⁵	60 men, 8 weeks of training	Body fat dropped vs. placebo
Chromium, 200 or 400 mcg	Kaats 1996³⁹	154 adults, 72 days	Body composition improved vs. placebo
Chromium, 400 mcg	Kaats 1998⁴⁰	122 adults, 90 days	Repeated the 1996 results

Fenugreek, 600 mg

Study: Rao 2020³⁵
Who, how long: 138 men, 8 weeks
Result: Lean mass +1.8% vs. +0.5% on placebo

Fenugreek, 600 mg

Study: Wankhede 2016²⁵
Who, how long: 60 men, 8 weeks of training
Result: Body fat dropped vs. placebo

Chromium, 200 or 400 mcg

Study: Kaats 1996³⁹
Who, how long: 154 adults, 72 days
Result: Body composition improved vs. placebo

Chromium, 400 mcg

Study: Kaats 1998⁴⁰
Who, how long: 122 adults, 90 days
Result: Repeated the 1996 results

Ingredient (dose studied)	Study	Who, how long	Result
Fenugreek, 600 mg with minerals	Steels 2011⁴¹	60 men, 6 weeks	81.5% reported more energy

Fenugreek, 600 mg with minerals

Study: Steels 2011⁴¹
Who, how long: 60 men, 6 weeks
Result: 81.5% reported more energy

Ingredient (dose studied)	Study	Who, how long	Result
Caffeine, 40 mg	Smith 1999⁴²	144 students	Alertness up vs. placebo. Faster reaction times
Caffeine, 12.5 to 100 mg	Smit 2000⁴³	23 adults	Faster reaction time at every dose, even 12.5 mg

Caffeine, 40 mg

Study: Smith 1999⁴²
Who, how long: 144 students
Result: Alertness up vs. placebo. Faster reaction times

Caffeine, 12.5 to 100 mg

Study: Smit 2000⁴³
Who, how long: 23 adults
Result: Faster reaction time at every dose, even 12.5 mg

Long-term safety: 191 adults took ashwagandha 600 mg daily for 12 months with no serious side effects (observational study).⁴⁴

These results come from studies of individual ingredients, not of SuperFuel™ as a finished product. Individual results vary.

No lifelong commitments or needles. Just results.

Increasing your testosterone naturally doesn't have to involve prescriptions. There's a third option. Support the testosterone your body already makes.

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THE SOURCES

Every claim, every source

# Source Used in

1 Santi D, Spaggiari G, Furini C, et al. Temporal trends in serum testosterone and luteinizing hormone levels... in healthy men: a systematic review. J Endocrinol Invest. 2025;48(11):2721-2734. doi:10.1007/s40618-025-02671-9 Used in 1

2 Travison TG, Araujo AB, O'Donnell AB, Kupelian V, McKinlay JB. A population-level decline in serum testosterone levels in American men. J Clin Endocrinol Metab. 2007;92(1):196-202. doi:10.1210/jc.2006-1375 Used in 1

3 New England Research Institutes. Testosterone levels in men decline over past two decades. Press release on Travison et al., via Newswise. Used in 1

4 Lokeshwar SD, et al. Decline in serum testosterone levels among adolescent and young adult men in the USA. Eur Urol Focus. 2021;7(4):886-889. Used in 1

5 Cai M, Chen J. Association between Life's Essential 8 and testosterone deficiency in men: NHANES 2011-2016. Front Endocrinol. 2024;15:1394383. doi:10.3389/fendo.2024.1394383 Used in 1

6 Mulligan T, Frick MF, Zuraw QC, Stemhagen A, McWhirter C. Prevalence of hypogonadism in males aged at least 45 years: the HIM study. Int J Clin Pract. 2006;60(7):762-769. doi:10.1111/j.1742-1241.2006.00992.x Used in 2

7 Leproult R, Van Cauter E. Effect of 1 week of sleep restriction on testosterone levels in young healthy men. JAMA. 2011;305(21):2173-2174. doi:10.1001/jama.2011.710 Used in 2, 3

8 University of Chicago Medicine. Sleep loss lowers testosterone in healthy young men. May 31, 2011. Used in 3

9 Whittaker J, Wu K. Low-fat diets and testosterone in men: systematic review and meta-analysis of intervention studies. J Steroid Biochem Mol Biol. 2021;210:105878. doi:10.1016/j.jsbmb.2021.105878 Used in 3

10 Prasad AS, Mantzoros CS, Beck FW, Hess JW, Brewer GJ. Zinc status and serum testosterone levels of healthy adults. Nutrition. 1996;12(5):344-348. doi:10.1016/s0899-9007(96)80058-x Used in 3, 5

11 Kumagai H, Zempo-Miyaki A, Yoshikawa T, Tsujimoto T, Tanaka K, Maeda S. Increased physical activity has a greater effect than reduced energy intake on... testosterone. J Clin Biochem Nutr. 2016;58(1):84-89. doi:10.3164/jcbn.15-48 Used in 3

12 Kumagai H, et al. Vigorous physical activity is associated with... increased serum testosterone levels in overweight/obese men. Horm Metab Res. 2018;50(1):73-79. doi:10.1055/s-0043-117497 Used in 3

13 Fulgoni VL, et al. Foods, fortificants, and supplements: where do Americans get their nutrients? J Nutr. 2011;141(10):1847-1854. Used in 3, 4, 5

14 Bailey RL, et al. Examination of vitamin intakes among US adults by dietary supplement use. J Acad Nutr Diet. 2012;112(5):657-663. Used in 4

15 Wallace TC, et al. Multivitamin/mineral supplement contribution to micronutrient intakes in the United States, 2007-2010. J Am Coll Nutr. 2014;33(2):94-102. Used in 4

16 Bird JK, et al. Risk of deficiency in multiple concurrent micronutrients in children and adults in the United States. Nutrients. 2017;9(7):655. Used in 4

17 Blumberg JB, et al. Impact of frequency of multi-vitamin/multi-mineral supplement intake on nutritional adequacy... in U.S. adults. Nutrients. 2017;9(8):849. Used in 4

18 Cowan AE, et al. Total usual micronutrient intakes compared to the Dietary Reference Intakes among U.S. adults... Nutrients. 2019. Used in 4

19 Freedman MR, et al. Temporal changes in micronutrient intake among US adults, NHANES 2003-2018. Am J Clin Nutr. 2024. Used in 4

20 Wang W, et al. Trends in the nutritional biomarkers by demographic characteristics across 14 years among US adults. Nutrients. 2022. Used in 4

21 Centers for Disease Control and Prevention. Second National Report on Biochemical Indicators of Diet and Nutrition in the U.S. Population. Used in 4

22 Cumming DC, Quigley ME, Yen SSC. Acute suppression of circulating testosterone levels by cortisol in men. J Clin Endocrinol Metab. 1983;57(3):671-673. doi:10.1210/jcem-57-3-671 Used in 3, 5

23 Chandrasekhar K, Kapoor J, Anishetty S. A prospective, randomized double-blind, placebo-controlled study... of ashwagandha root in reducing stress and anxiety in adults. Indian J Psychol Med. 2012;34(3):255-262. Used in 5, 8

24 Talbott SM, Talbott JA, George A, Pugh M. Effect of Tongkat Ali on stress hormones and psychological mood state in moderately stressed subjects. J Int Soc Sports Nutr. 2013;10:28. doi:10.1186/1550-2783-10-28 Used in 5, 8

25 Wankhede S, Mohan V, Thakurdesai P. Beneficial effects of fenugreek glycoside supplementation in male subjects during resistance training... J Sport Health Sci. 2016;5(2):176-182. doi:10.1016/j.jshs.2014.09.005 Used in 5, 8

26 Badmaev V, Majeed M, Norkus EP. Piperine increases serum response of beta-carotene during 14 days of oral beta-carotene supplementation. Nutr Res. 1999;19(3):381-388. Used in 6

27 Qureshi A, Naughton DP, Petroczi A. A systematic review on the herbal extract Tribulus terrestris... J Diet Suppl. 2014;11(1):64-79. doi:10.3109/19390211.2014.887602 Used in 7

28 Harris DR, Chapman-Lopez T, Machek SB, et al. The effects of multiple acute turkesterone doses on indirect measures of hypertrophy... Muscles. 2024;3(4):364-375. doi:10.3390/muscles3040031 Used in 7

29 Crisanti A, Silver T, Jiannine L, Antonio J. The effects of an ecdysteroid supplement on indices of physical and mental performance. J Int Soc Sports Nutr. 2025. doi:10.1080/15502783.2025.2550140 Used in 7

30 Yakubu MT, Akanji MA, Oladiji AT. Aphrodisiac potentials of the aqueous extract of Fadogia agrestis stem in male albino rats. Asian J Androl. 2005;7(4):399-404. doi:10.1111/j.1745-7262.2005.00052.x Used in 7

32 Wankhede S, Langade D, Joshi K, et al. Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial. J Int Soc Sports Nutr. 2015;12:43. Used in 5, 8

33 Rao A, Steels E, Inder WJ, Abraham S, Vitetta L. Testofen, a specialised Trigonella foenum-graecum seed extract... in healthy aging males. Aging Male. 2016;19(2):134-142. Used in 8

34 Salve J, Pate S, et al. Adaptogenic and anxiolytic effects of ashwagandha root extract in healthy adults. Cureus. 2019;11(12):e6466. Used in 8

35 Rao AJ, Mallard AR, Grant R. Testofen (fenugreek extract) increases strength and muscle mass compared to placebo... Transl Sports Med. 2020;3(4):374-380. doi:10.1002/tsm2.153 Used in 8

36 Choudhary B, Shetty A, Langade D. Efficacy of ashwagandha in improving cardiorespiratory endurance in healthy athletic adults. Ayu. 2015;36(1):63-68. Used in 8

37 Tiwari S, Gupta SK, Pathak AK. A double-blind, randomized, placebo-controlled trial on the effect of ashwagandha root extract... J Ethnopharmacol. 2021;272:113929. Used in 8

38 Poole C, Bushey B, Foster C, et al. The effect of a commercially available botanical supplement on strength, body composition... in resistance-trained males. J Int Soc Sports Nutr. 2010;7:34. Used in 8

39 Kaats GR, et al. Effects of chromium picolinate supplementation on body composition: a randomized, double-masked, placebo-controlled study. Curr Ther Res. 1996;57(10):747-756. Used in 8

40 Kaats GR, et al. A randomized, double-masked, placebo-controlled study of... chromium picolinate on body composition: a replication and extension. Curr Ther Res. 1998;59(6):379-388. Used in 8

41 Steels E, Rao A, Vitetta L. Physiological aspects of male libido enhanced by standardized Trigonella foenum-graecum extract and mineral formulation. Phytother Res. 2011;25(9):1294-1300. doi:10.1002/ptr.3360 Used in 8

42 Smith A, Sturgess W, Gallagher J. Effects of a low dose of caffeine given in different drinks on mood and performance. Hum Psychopharmacol Clin Exp. 1999;14:473-482. Used in 8

43 Smit HJ, Rogers PJ. Effects of low doses of caffeine on cognitive performance, mood and thirst. Psychopharmacology. 2000;152:167-173. Used in 8

44 Salve J, Kale S, Prajapati BL, et al. Safety of 12-months administration of ashwagandha standardized root extract in healthy adults. Phytother Res. 2025. Used in 8

45 Chinnappan SM, George A, Pandey P, Narke G, Choudhary YK. Effect of Eurycoma longifolia standardised aqueous root extract... on testosterone levels... in ageing male subjects. Food Nutr Res. 2021;65:5647. doi:10.29219/fnr.v65.5647 Used in 8

46 Zhu A, et al. What is a normal testosterone level for young men? Rethinking the 300 ng/dL cutoff... J Urol. 2022. doi:10.1097/JU.0000000000002928 Used in 1

48 Hirshkowitz M, Whiton K, Albert SM, et al. National Sleep Foundation's sleep time duration recommendations: methodology and results summary. Sleep Health. 2015;1(1):40-43. doi:10.1016/j.sleh.2014.12.010 Used in 3

*Extrapolated data point, assuming a 2% yearly decline from 2016 to 2026.

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Same age does not equal same testosterone.

SAME AGE. DIFFERENT DECADE.

HOW LOW TESTOSTERONE SHOWS UP