Our "No Return Necessary"
Money-Back Guarantee

If you don’t like something of ours, guess what happens next?

No, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon. Nor do we ask you to fill a cursed inkwell with orc’s blood and demon saliva and then use it to complete reams of return forms written in ancient Cyrillic script.

We just . . . wait for it . . . give you your money back. Holy moo cows. And that means you can say "yes" now and decide later.

Will Forge melt fat from your belly, hips, and thighs faster than a sneeze in a cyclone? No.

Will it turbocharge your metabolism and energy levels? Absolutely not.

But is Forge the only[1] Some popular pre-workout fat burners are all-natural. Some contain the right mix of high-quality ingredients. Some provide clinically effective doses. But only Forge checks each of these boxes. natural[2] Forge doesn’t just “contain natural ingredients''—every ingredient is naturally sourced from plants and animals. Forge contains no artificial or synthetic substances of any kind. thermogenic pre-workout fat burner with clinically effective doses[3] Every serving of Forge contains 2,760 milligrams of active ingredients that have been shown to be safe and effective in peer-reviewed scientific research. of three ingredients scientifically shown[4] Each active ingredient in Forge is backed by published scientific studies that show benefits in healthy humans. to increase fat loss and exercise performance and reduce muscle loss?

Yes. Or your money back.

  • 17 peer-reviewed scientific studies support Forge’s combination of ingredients and doses[5] That’s 159 pages of scientific research that shows Forge works exactly like we say it does.
  • Contains no artificial fillers, food dyes, or other chemical junk[6] While these types of chemicals may not be as dangerous as some people claim, studies suggest that regular consumption of them may indeed be harmful to our health. And that’s why you won’t find them in Forge.
  • Analyzed for purity and potency in a state-of-the-art ISO 17025 accredited lab[7] Every bottle of Forge is guaranteed to provide exactly what the label claims and nothing else—no heavy metals, microbes, allergens, or other contaminants.
  • Total formulation transparency (no proprietary blends)[8] This means you know exactly what’s in every serving of Forge—every dose of every ingredient—and can verify the accuracy and efficacy of the formulation.
  • Made in the USA with globally sourced ingredients in NSF-certified and FDA-inspected and cGMP-compliant facilities

Forge is also backed by our “No Return Necessary” money-back guarantee that works like this:

If you don’t absolutely love Forge, just let us know, and we’ll give you a full refund on the spot. No forms or returns necessary.

So order now, try Forge risk free, and see for yourself why it’s one of the most popular all-natural pre-workout fat burners in the world (over 100,000 bottles sold and counting!).

Will Forge melt fat from your belly, hips, and thighs faster than a sneeze in a cyclone? No.

Will it turbocharge your metabolism and energy levels? Absolutely not.

But will Forge support fat loss and preserve more muscle and strength when dieting? Yes. Or your money back.

  • Total formulation transparency (no proprietary blends)[8] This means you know exactly what’s in every serving of Forge—every dose of every ingredient—and can verify the accuracy and efficacy of the formulation.
  • Made in the USA with globally sourced ingredients in NSF-certified and FDA-inspected and cGMP-compliant facilities
  • Backed by our “No Return Necessary” money-back guarantee that works like this: If you don’t absolutely love Forge, just let us know, and we’ll give you a full refund on the spot. No forms or returns necessary.

So order now, try Forge risk free, and see for yourself why it’s one of the most popular all-natural pre-workout fat burners in the world (over 100,000 bottles sold and counting!).

Notice to California Consumers

WARNING: Consuming this product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food.

Ingredients (2,810 milligrams per serving)

Yohimbine (10 milligrams per serving)

Yohimbine is a naturally occurring substance found in several types of plants native to central and western Africa, including the bark of the yohimbe tree.

Studies show that yohimbine enhances fat loss by increasing metabolic rate and making “stubborn fat” deposits (usually the stomach, hip, and thigh regions) easier to lose.[9][10][11]

The details of how yohimbine speeds up the elimination of “stubborn fat” are rather technical, but the gist is it suppresses a mechanism in the fat cells of these hard-to-reduce areas that prevents them from being mobilized.[12]

In other words, yohimbine accelerates fat loss by helping your body’s natural fat-burning chemicals work more effectively.[13]

Research also shows that yohimbine can enhance exercise performance by staving off physical fatigue—a welcome bonus when you’re restricting calories for fat loss.[14]

There’s a catch with yohimbine, though: elevated insulin levels completely negate its weight-loss effects. To avoid this, you want to use yohimbine only when you’re exercising in a fasted state.[15][16]

The clinically effective dose of yohimbine is between 0.1 and 0.2 milligrams per kilogram of body weight.

Yohimbine Plant

β-Hydroxy β-Methylbutyrate (2.5 grams per serving)

β-Hydroxy β-Methylbutyrate, also known as HMB, is a substance formed when your body metabolizes the amino acid leucine, which is an amino acid that stimulates protein synthesis.[17]

HMB is often sold as a muscle-building aid, but the research used to support these claims is shaky at best.[18] That said, well-designed studies do show that HMB is an effective anti-catabolic (muscle sparing) agent.[19]

In other words, while it isn’t good at increasing muscle synthesis rates, it is good at reducing muscle breakdown rates.[20] This, in turn, can help you retain more muscle while cutting, especially if you’re also training in a fasted state (as this produces a marked increase in muscle breakdown rates).

Additionally, research shows HMB is superior to leucine in suppressing muscle loss, making it more effective to this end than branched chain amino acid (BCAAs), which rely on leucine for their muscle-sparing effects.[21][22][23]

The clinically effective dose of HMB is between 2 and 3 grams.

Raw piece of steak

Synephrine From Advantra Z® (300 milligrams per serving)

Synephrine is a chemical compound found in certain types of citrus fruits, with the most common source being the bitter variety.

It’s chemically similar to ephedrine, adrenaline, and noradrenaline and thus produces similar effects in the body.

That’s why research shows that supplementation with synephrine . . .

  • Increases resting metabolic rate[24]
  • Boosts lipolysis (the breakdown of fat cells)[25]
  • Inhibits activity of fat cell receptors that prevents fat mobilization[26]

Furthermore, studies show synephrine works synergistically with caffeine to enhance both caffeine’s and its own fat loss properties.[27]

The clinically effective dose of synephrine is between 25 and 50 milligrams. Forge contains 300 milligrams of Advantra Z®, which is 10% synephrine by weight, providing 30 milligrams of synephrine.

Whole egg and broken in half egg with yolk inside

No Artificial Food Dyes or Other Chemical Junk

Artificial food dyes aren’t a hazard per se, but studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.[28][29][30][31][32]

No Artificial Food Dyes or Other Chemical Junk

Lab Tested for Potency & Purity

Every bottle of Forge is analyzed in a state-of-the-art ISO 17025 accredited lab to verify what is and isn’t in it. That way, you know exactly what you’re getting and putting into your body.

Lab Tested for Potency & Purity
Forge Lab Test Certificate

See how Legion compares to the rest.

  • Active Ingredients
  • Clinically Effective Ingredients & Doses
  • Yohimbine
  • β-Hydroxy
    β-Methylbutyrate
  • Synephrine From Advantra Z®
  • Natural Ingredients
  • Lab Tested
  • Labdoor Certified Brand
  • Price Per Serving
  • Legion
    Forge

    Legion Plant+
  • 2,810 mg
    per serving
  • True
  • 10 mg
    per serving
  • 2.5 g
    per serving
  • 300 mg
    per serving
  • True
  • True
  • True
  • $
  • JYM SS8 Advanced Fat Burner

    Vega
  • 2,950 mg
    per serving
  • False
  • 4.5 mg
    per serving
  • False
  • False
  • True
  • Question Mark
  • False
  • $2.00
  • Muscletech Hydroxycut
    Hardcore Elite

    Jym Protein
  • 826 mg
    per serving
  • False
  • 3.36 mg
    per serving
  • False
  • False
  • False
  • Question Mark
  • False
  • $0.34
  • Alani Nu
    Fat Burner

    PEScience
  • 284 mg
    per serving
  • False
  • 0.125 mg
    per serving
  • False
  • False
  • True
  • Question Mark
  • False
  • $0.67

The #1 brand of all-natural sports supplements.

Over 4,000,000 bottles sold to over 800,000 customers who have left us over 45,000 5-star reviews.

Natural Ingredients
No Chemical Junk

Forge doesn’t just “contain natural ingredients”—every ingredient is naturally sourced. We don’t use artificial or synthetic substances of any kind.

Science-Backed Ingredients
Science-Backed Ingredients

Every ingredient in Forge is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.

Clinically Effective Doses
Clinically Effective Ingredients & Doses

Every ingredient in Forge is included at clinically effective levels, which are the exact amounts shown to be safe and effective in peer-reviewed scientific research.

Lab Tested
Lab Tested

Forge is tested by third-party labs for heavy metals, microbes, allergens, and other contaminants to ensure it meets FDA purity standards.

Made in USA
Made in USA with Globally Sourced Ingredients

Forge is proudly made in America in NSF-certified and FDA-inspected facilities in accordance with the Current Good Manufacturing Practice (cGMP) regulations.

100% Money-Back-Guarantee
"No Return Necessary"
Money-Back Guarantee

If you don't absolutely love Forge, you get a prompt and courteous refund. No forms or returns necessary.

Trusted by scientists, doctors, and everyday fitness folk alike.

Previous
  • Dr. Spencer Nadolsky, MD

    Board-Certified Family Medicine Physician, a Diplomate of the American Board of Obesity Medicine, and Legion Advisory Board Member

    "There are a lot of sleazy supplement companies out there, but Legion is not one of them. Their products are free of fillers and inactive ingredients and they take the time (and money) to test them with independent labs to ensure you're getting what you pay for."

  • Menno Henselmans, MS

    Founder of Bayesian Bodybuilding, Published Scientist, Physique Coach, and Legion Advisory Board Member

    "Legion consults with nutrition experts to make honest, science-based products and then proves they're genuine with independent lab work. That's how all supplement companies should operate."

  • Dr. Bill Campbell, PhD

    Professor of Exercise Science at University of South Florida and Legion Advisory Board Member

    "Legion is science-based at its core. All of their products contain doses proven to be effective by scientific studies, and they fund new research. They don't just want to sell you supplements—they want to change the supplement industry for the better."

  • James Krieger, MS

    Published Scientist, Author, and Speaker

    "There are three reasons I like Legion. First, they use ingredients backed by independent, peer-reviewed scientific studies. Second, the quality of their supplements exceeds many in the industry and you know you’re getting what’s on the label. Third, Mike Matthews is a solid evidence-based guy who doesn’t over-hype."

  • Chris Barakat, MS

    Published Scientist and Physique Coach

    "I've been involved in the supplement industry for over a decade now, and I can tell you that Legion is the ONLY company doing EVERYTHING right! They make effective products that are backed by scientific evidence, properly dose all of their ingredients, source every ingredient from the highest-quality sources, and are transparent about exactly what goes in each and every product."

  • Kurtis Frank

    Co-Founder and Former Lead Researcher & Writer of Examine.com

    "With Legion, you really do get what you pay for. Each and every product is packed with effective doses of effective ingredients, and what’s on the label is what's actually in the bottle."

  • Jordan Syatt

    Strength and Nutrition Coach

    "Legion is a tremendous company run by people I trust and respect. The quality of their supplements is second to no one. And while I don’t use many supplements, the only ones I do come from Legion."

  • Sal Di Stefano, Justin Andrews, and Adam Schafer

    Hosts of The Mind Pump Podcast

    "When it comes to quality and integrity, Legion is among the best. Their products only include ingredients that are backed by research and in doses that are proven to be effective in scientific studies."

Next

Frequently Asked Questions

How do I use Forge?
Why is Forge only for use with fasted exercise?
How does Forge differ from Phoenix? Can they be used together?
How quickly will I see results with Forge?
Even if Forge helps me lose weight, will I just gain it back when I stop taking it?
Will I lose muscle if I do fasted exercise and take Forge?
How long can I safely use Forge for?
What the heck is a “pre-workout fat burner”?
Should I take Forge every day?
Is Forge suitable for both fasted weightlifting and cardio?
Should I take Forge if I’m bulking?
What does the Prop65 warning on the labels mean?
Is Forge vegan or vegetarian-friendly?

+Scientific References

9. Yohimbine: the effects on body composition and exercise performance in soccer players.

Ostojic SM. Res Sports Med. 2006 Oct-Dec;14(4):289-99. doi: 10.1080/15438620600987106.

10. Yohimbine and rauwolscine reduce food intake of genetically obese (obob) and lean mice.

Callahan MF, Beales M, Oltmans GA. Pharmacol Biochem Behav. 1984 Apr;20(4):591-9. doi: 10.1016/0091-3057(84)90309-5.

11. Alpha-2 adrenoceptors in lipolysis: alpha 2 antagonists and lipid-mobilizing strategies.

Lafontan M, Berlan M, Galitzky J, Montastruc JL. Am J Clin Nutr. 1992 Jan;55(1 Suppl):219S-227S. doi: 10.1093/ajcn/55.1.219s.

12. Yohimbine: the effects on body composition and exercise performance in soccer players.

Ostojic SM. Res Sports Med. 2006 Oct-Dec;14(4):289-99. doi: 10.1080/15438620600987106.

13. Agonist and antagonist actions of yohimbine as compared to fluparoxan at alpha(2)-adrenergic receptors (AR)s, serotonin (5-HT)(1A), 5-HT(1B), 5-HT(1D) and dopamine D(2) and D(3) receptors. Significance for the modulation of frontocortical monoaminergic transmission and depressive states.

Millan MJ, Newman-Tancredi A, Audinot V, Cussac D, Lejeune F, Nicolas JP, Cogé F, Galizzi JP, Boutin JA, Rivet JM, Dekeyne A, Gobert A. Psychopharmacology Department, Institut de Recherches Servier, Centre de Recherches de Croissy, 125, Chemin de Ronde, 78290-Croissy-sur-Seine, Paris, France. Synapse. 2000 Feb;35(2):79-95.

14. Ergogenic Effects of Yohimbine: Standardized Cycling Clinical Study.

Al-kuraishy H, Abood HAN, Al-Gareeb A. 2014.

15. Alpha 2-antagonist compounds and lipid mobilization: evidence for a lipid mobilizing effect of oral yohimbine in healthy male volunteers.

Galitzky J, Taouis M, Berlan M, Rivière D, Garrigues M, Lafontan M. Laboratoire de Pharmacologie Clinique et Médicale, Université Paul Sabatier, Toulouse, France. Eur J Clin Invest. 1988 Dec;18(6):587-94.

16. Pre-exercise administration of yohimbine may enhance the efficacy of exercise training as a fat loss strategy by boosting lipolysis.

McCarty MF. Pantox Laboratories, California 92109, USA Med Hypotheses. 2002 Jun;58(6):491-5.

17. Signaling pathways and molecular mechanisms through which branched-chain amino acids mediate translational control of protein synthesis.

Kimball SR, Jefferson LS. Department of Cellular and Molecular Physiology, Pennsylvania State University College of Medicine, Hershey, PA, USA. J Nutr. 2006 Jan;136(1 Suppl):227S-31S.

18. Effects of beta-hydroxy-beta-methylbutyrate supplementation during resistance training on strength, body composition, and muscle damage in trained and untrained young men: a meta-analysis.

Rowlands DS, Thomson JS. Exercise and Sport Sciences, Institute of Food, Nutrition and Human Health, Massey University, Wellington, New Zealand. J Strength Cond Res. 2009 May;23(3):836-46. doi: 10.1519/JSC.0b013e3181a00c80.

19. β-Hydroxy-β-methylbutyrate free acid reduces markers of exercise-induced muscle damage and improves recovery in resistance-trained men.

Wilson JM, Lowery RP, Joy JM, et al. Br J Nutr. 2013 Aug 28;110(3):538-44. doi: 10.1017/S0007114512005387. Epub 2013 Jan 3.

21. Effects of leucine and its metabolite β-hydroxy-β-methylbutyrate on human skeletal muscle protein metabolism.

Wilkinson DJ, Hossain T, Hill DS, Phillips BE, Crossland H, Williams J, Loughna P, Churchward-Venne TA, Breen L, Phillips SM, Etheridge T, Rathmacher JA, Smith K, Szewczyk NJ, Atherton PJ. Metabolic and Molecular Physiology Research Group, MRC-ARUK Centre of Excellence for Musculoskeletal Ageing Research, School of Graduate Entry Medicine and Health, Derby DE22 3DT, UK. J Physiol. 2013 Jun 1;591(Pt 11):2911-23. doi: 10.1113/jphysiol.2013.253203. Epub 2013 Apr 3.

22. Hypoglycemic effect of isoleucine involves increased muscle glucose uptake and whole body glucose oxidation and decreased hepatic gluconeogenesis.

Doi M, Yamaoka I, Nakayama M, Sugahara K, Yoshizawa F. Division of Pharmacology, Drug Safety and Metabolism, Otsuka Pharmaceutical Factory, Inc., Naruto, Tokushima 772-8601, Japan. Am J Physiol Endocrinol Metab. 2007 Jun;292(6):E1683-93. Epub 2007 Feb 13.

23. Regulation of valine metabolism in man: a stable isotope study.

Staten MA, Bier DM, Matthews DE. Am J Clin Nutr. 1984 Dec;40(6):1224-34.

24. Citrus aurantium and synephrine alkaloids in the treatment of overweight and obesity: an update.

Haaz S, Fontaine KR, Cutter G, Limdi N, Perumean-Chaney S, Allison DB. Obes Rev. 2006;7(1):79-88. doi:10.1111/j.1467-789X.2006.00195.x.

25. Effects of p-synephrine alone and in combination with selected bioflavonoids on resting metabolism, blood pressure, heart rate and self-reported mood changes.

Stohs SJ, Preuss HG, Keith SC, Keith PL, Miller H, Kaats GR. Int J Med Sci. 2011;8(4):295-301. Published 2011 Apr 28. doi:10.7150/ijms.8.295.

26. Activities of octopamine and synephrine stereoisomers on alpha-adrenoceptors.

Brown CM, McGrath JC, Midgley JM, et al. Br J Pharmacol. 1988;93(2):417-429. doi:10.1111/j.1476-5381.1988.tb11449.x.

27. Effect of acute administration of an herbal preparation on blood pressure and heart rate in humans.

Seifert JG, Nelson A, Devonish J, Burke ER, Stohs SJ. Int J Med Sci. 2011;8(3):192-197. Published 2011 Mar 2. doi:10.7150/ijms.8.192.

28. Toxicological significance of azo dye metabolism by human intestinal microbiota.

Feng J, Cerniglia CE, Chen H. Division of Microbiology, National Center for Toxicological Research, US Food and Drug Administration, AR , USA. Front Biosci (Elite Ed). 2012 Jan 1;4:568-86.

29. Artificial food dyes and attention deficit hyperactivity disorder.

Kanarek RB. Department of Psychology, Tufts University, Medford, Massachusetts, USA. Nutr Rev. 2011 Jul;69(7):385-91.

30. Meta-analysis of attention-deficit/hyperactivity disorder or attention-deficit/hyperactivity disorder symptoms, restriction diet, and synthetic food color additives.

Nigg JT, Lewis K, Edinger T, Falk M. Oregon Health and Science University, Portland, OR, USA. J Am Acad Child Adolesc Psychiatry. 2012 Jan;51(1):86-97.e8.

31. Food additives and hyperactive behaviour in 3-year-old and 8/9-year-old children in the community: a randomised, double-blinded, placebo-controlled trial.

McCann D, Barrett A, Cooper A, Crumpler D, Dalen L, Grimshaw K, Kitchin E, Lok K, Porteous L, Prince E, Sonuga-Barke E, Warner JO, Stevenson J. School of Psychology, Department of Child Health, University of Southampton, Southampton, UK. Lancet. 2007 Nov 3;370(9598):1560-7.

32. Effect of food azo dye tartrazine on learning and memory functions in mice and rats, and the possible mechanisms involved.

Gao Y, Li C, Shen J, Yin H, An X, Jin H. Scientific and Technological College of Chemistry and Biology, Yantai Univ., Yantai, PR China. J Food Sci. 2011 Aug;76(6):T125-9.