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 every penny of your money back. Holy moo cows. And that means you can say "yes" now and decide later.
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.
Legion HMB Ingredient (3,000 milligrams per serving)
myHMB® β-Hydroxy β-Methylbutyrate (3,000 milligrams per serving)
β-Hydroxy β-Methylbutyrate (HMB) is a compound produced when the body breaks down leucine, an amino acid that stimulates protein synthesis.[1]
myHMB® is a patented form of HMB and one of the most clinically proven forms on the market, with over 50 peer-reviewed studies supporting its safety and efficacy.
HMB reduces protein breakdown, strengthens muscle cell membranes, and activates muscle-building molecules like mTOR and IGF-1.[2][3]
Research shows that supplementation with myHMB® . . .
Reduces muscle loss while training in a calorie deficit[4][5][6][7]
The clinically effective dose of HMB is between 2,000 and 3,000 milligrams.
No Artificial Food Dyes, Fillers, or Other Unnecessary Junk
Artificial food dyes and fillers may not be as dangerous as some people claim, but studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.[16][17][18][19][20]
That’s why we use natural coloring derived from fruits and other foods as well as naturally derived ingredients for enhancing shelf life and facilitating the manufacturing process.
Third-Party Lab Tested for Purity and Potency
Our HMB is tested by a state-of-the-art ISO 17025-accredited third-party laboratory for heavy metals, microbes, allergens, and other contaminants to ensure compliance with FDA purity standards.
See how Legion HMB compares to the rest.
β-Hydroxy β-Methylbutyrate
Patented myHMB®
Clinically Effective Ingredient & Dose
Third-Party Lab Tested
Labdoor Certified Brand
Price Per Serving
Legion HMB
3,000 mg per serving
$
Optimum Nutrition HMB
3,000 mg per serving
$1.33
NOW Sports HMB
1,000 mg per serving
$0.49
Muscletech HMB
1000 mg per serving
$0.59
The #1 brand of naturally sweetened sports supplements.
We’ve sold over 5 million bags and bottles to over 1 million customers in 169 countries who have left us over 45,000 5-star reviews.
Clinically Effective Ingredient and Dose
The active ingredient, form, and dose in our HMB is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
No Unnecessary Junk
Our HMB contains no artificial food dyes, fillers, or other unnecessary junk.
Total Label Transparency
We clearly list the dose of each ingredient in our HMB on the label—no proprietary blends or hidden ingredients—so you can verify our formulation’s validity and effectiveness.
Third-Party Lab Tested for Purity and Potency
Our HMB is tested by a state-of-the-art ISO 17025-accredited third-party laboratory for heavy metals, microbes, allergens, and other contaminants to ensure compliance with FDA purity standards.
Made in the USA
Our HMB is made in America with globally sourced ingredients in NSF-certified, FDA-inspected facilities that adhere to Current Good Manufacturing Practice (cGMP) standards.
100% Money-Back Guarantee
If you don't absolutely love our HMB, you get a prompt and courteous refund. No forms or returns necessary.
Trusted by scientists, doctors, and everyday fitness folk alike.
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"Legion is science-based at its core. Not only do they dose all of their products based on the clinical doses proven to be effective by scientific studies, they go above and beyond the their competitors by funding new research."
Dr. Bill Campbell, PhD
Professor of Exercise Science at University of South Florida
"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."
Dr. Spencer Nadolsky, MD
Board-Certified Family Medicine Physician and a Diplomate of the American Board of Obesity Medicine
"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."
Sal Di Stefano, Justin Andrews, and Adam Schafer
Hosts of The Mind Pump Podcast
"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."
Jordan Syatt
Strength and Nutrition Coach
"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."
Menno Henselmans, MS
Founder of Bayesian Bodybuilding, Published Scientist, and Physique Coach
"Legion's customers are getting some of the best sports supplements on the market."
"Legion Pulse is the best overall pre-workout, especially for energy and focus."
Take one serving (4 capsules) 15 minutes prior to fasted training.
What makes your HMB different from other HMB supplements on the market?
Many HMB supplements contain ineffective doses of generic β-Hydroxy β-Methylbutyrate. Our HMB, on the other hand, contains a clinically effective dose of a patented form of HMB called myHMB®, which is one of the most clinically proven forms on the market, with over 50 peer-reviewed studies supporting its safety and efficacy.
It also contains no artificial fillers, food dyes, or other unnecessary junk. And it’s tested in an ISO 17025-accredited lab for purity and potency, has a transparent label with no proprietary blends, and is made in NSF-certified, FDA-inspected, and cGMP-compliant facilities.
In short, most HMB supplements don’t check all the boxes our HMB does.
Can I take your HMB with other Legion supplements?
Yes.
You can take our HMB alongside other Legion supplements. Just keep in mind that HMB is most effective when taken before fasted training.
In other words, it pairs well with supplements that boost workout performance without breaking your fast, such as Pulse or Legion Energy Drink.
However, it’s likely to be less effective if you take it with products that contain calories and already offer a muscle-sparing effect, like Whey+ or a Legion Protein Bar.
A supplement I take already contains HMB. Can I benefit from taking your HMB?
Possibly—but it depends on how much HMB you’re getting and how you’re using it.
To get meaningful results, you need to take 2,000-to-3,000 milligrams of HMB before fasted training. If your current supplement provides that dose and you’re using it that way, you likely don’t need more.
But if the dose is lower—or if the supplement isn’t intended for fasted training—adding our HMB may offer additional benefits.
How many servings of HMB should I take per day? How much is too much?
Take one serving (4 capsules) per day, ideally about 15 minutes before fasted training.
It’s hard to say exactly how much HMB is “too much,” as few studies have tested doses above 3,000 milligrams per day. That said, one study found that taking 6,000 milligrams daily was safe and well-tolerated.[1]
HMB is only really effective when taken before fasted training. On rest days, when there’s no workout-induced muscle breakdown to prevent, it doesn’t offer much benefit.
Can I take HMB if I don’t train fasted?
You can—but it’s unlikely to offer much benefit.
While some supplement companies market HMB as a muscle-building aid, the evidence for this is weak.[1] HMB doesn’t do much to increase muscle protein synthesis, but it’s highly effective at reducing muscle breakdown.[2]
That’s why it’s particularly useful when dieting or training fasted, when muscle breakdown rates are especially high.
Research also shows HMB is more effective than leucine at preventing muscle loss, making it a better option than BCAAs, which rely on leucine for their muscle-sparing effects.[3][4][5]
The most common thing we hear from customers in the short term is that they feel less sore after workouts.
As the weeks go by, most also find it easier to maintain muscle and strength while losing a similar—or even greater—amount of fat during a cut.
Are there any side effects of HMB?
No, HMB is generally safe and well-tolerated when used as directed by healthy adults.
Can HMB be taken while pregnant or breastfeeding?
While we’re not aware of any reasons it would be harmful, check with your doctor before taking HMB.
Can HMB be taken with medication?
While there are very few negative interactions between HMB and medications, there may be some, and thus you should always talk to your doctor if you’re currently taking medication and want to consider taking this product.
Is HMB gluten-free? Soy-free? Dairy-free?
Yes.
Is HMB vegetarian or vegan friendly?
Yes.
What does the Prop65 warning on the label mean?
Our products include a Proposition 65 warning in compliance with California’s regulatory guidelines, which are among the most stringent and sweeping in the world.
A Proposition 65 warning does not indicate whether a product is safe or unsafe. Rather, Proposition 65 is a consumer notification law in California that requires warnings to inform consumers about the presence of one or more of over 900 substances in various types of products. These substances include naturally occurring and ubiquitous compounds, even when present at levels below those known to cause harm.
Every serving of our HMB contains 3,000 milligrams of β-Hydroxy β-Methylbutyrate that has been shown to be safe and effective in peer-reviewed scientific research.↑
2.
The active ingredient in our HMB is backed by published scientific studies that show benefits in healthy humans.↑
3.
That’s 134 pages of scientific research that shows our HMB works exactly like we say it does.↑
4.
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 our HMB.↑
5.
Every bottle of our HMB is guaranteed to provide exactly what the label claims and nothing else—no heavy metals, microbes, allergens, or other contaminants.↑
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. ↑
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. ↑
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. ↑
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. ↑
Why the $99 minimum purchase amount for free shipping?
To quench our piggish lust for grubby profits in the eternal service of the dread lord Mammon?
Kind of. But not really. Because here's the truth:
Single-item orders are so blasted expensive to ship that we make very little profit on them. And no profits make the bean counters lose their marbles.
But when you order just one more item, it only costs us a few dollars more to ship both of them to you. Add a third item, and it's just a few more shekels to ship.
And that allows us to make a profit. Which keeps the bean counters happier than a hammer in a nail factory.
So, if it pleases your Grace, we humbly request your mercy and patronage notwithstanding the vexing free shipping minimum.
Why the $199 minimum purchase amount for free shipping?
To quench our piggish lust for grubby profits in the eternal service of the dread lord Mammon?
Kind of. But not really. Because here's the truth:
Single-item orders are so blasted expensive to ship that we make very little profit on them. And no profits make the bean counters lose their marbles.
But when you order just one more item, it only costs us a few dollars more to ship both of them to you. Add a third item, and it's just a few more shekels to ship.
And that allows us to make a profit. Which keeps the bean counters happier than a hammer in a nail factory.
So, if it pleases your Grace, we humbly request your mercy and patronage notwithstanding the vexing free shipping minimum.
Why the $299 minimum purchase amount for free shipping?
To quench our piggish lust for grubby profits in the eternal service of the dread lord Mammon?
Kind of. But not really. Because here's the truth:
Single-item orders are so blasted expensive to ship that we make very little profit on them. And no profits make the bean counters lose their marbles.
But when you order just one more item, it only costs us a few dollars more to ship both of them to you. Add a third item, and it's just a few more shekels to ship.
And that allows us to make a profit. Which keeps the bean counters happier than a hammer in a nail factory.
So, if it pleases your Grace, we humbly request your mercy and patronage notwithstanding the vexing free shipping minimum.
Many ingredients in supplements don’t have any scientifically validated benefits, and many ingredients that do are often underdosed to the point of irrelevance.
That’s why we only use the choice ingredients and precise doses shown to be effective in peer-reviewed scientific studies.
Many supplement ingredients lack scientifically validated benefits for healthy humans—we aren’t large rodents, after all—and those that do often use doses too low to be effective.
That’s why we exclusively use ingredients and doses proven effective in peer-reviewed scientific studies on healthy men and women.
While artificial food dyes and fillers may not be as dangerous as some people claim, studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.
That’s why we use natural coloring derived from fruits and other foods as well as naturally derived ingredients for enhancing shelf life and facilitating the manufacturing process.
If you want to ensure the supplements you’re swallowing every day are safe and effective, you want to buy from a company that:
Sources ingredients from premium suppliers around the world (great supplements require great raw materials)
Tests all products for purity and potency in accredited third-party laboratories (to conclusively verify safety and efficacy)
Manufactures final products in America (which has some of the strictest regulations in the world)
Which is exactly what we do here at Legion.
Did you know that some supplements contain dangerously high levels of toxins like lead, arsenic, and cadmium?
That’s why we rigorously test every ingredient in each of our supplements for heavy metals, microbes, allergens, and other contaminants, ensuring they meet the strict purity standards set by the FDA.
While artificial sweeteners, food dyes, and fillers may not be as dangerous as some people claim, studies suggest that regular consumption of these chemicals may indeed be harmful to our health.
That’s why we use natural sweeteners like stevia, erythritol, and monk fruit instead as well as natural coloring and flavoring derived from fruits and other foods.
Research shows that these ingredients are not only safe but can also confer several health benefits, including better nutrient absorption, healthy cholesterol and inflammation levels, and more.
The proprietary blend is little more than a sneaky way to use tiny (ineffective) amounts of lots of ingredients and hope customers don’t know any better.
Every dose listed. For every ingredient. In every product. Anything else is unacceptable.
While artificial food dyes and fillers may not be as dangerous as some people claim, studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.
That’s why we use natural coloring derived from fruits and other foods as well as naturally derived ingredients for enhancing shelf life and facilitating the manufacturing process.
Many supplement ingredients lack scientifically validated benefits for healthy humans—we aren’t large rodents, after all—and those that do often use doses too low to be effective.
That’s why we exclusively use ingredients and doses proven effective in peer-reviewed scientific studies on healthy men and women.
While artificial food dyes and fillers may not be as dangerous as some people claim, studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.
That’s why we use natural coloring derived from fruits and other foods as well as naturally derived ingredients for improving texture, enhancing shelf life, and facilitating the manufacturing process.
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 every penny of your money back. Holy moo cows. And that means you can say "yes" now and decide later.
Every active ingredient, form, and dose in This product is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
The ingredient, form, and dose in This product is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
Many supplement ingredients lack scientifically validated benefits for healthy humans—we aren’t large rodents, after all—and those that do often use doses too low to be effective.
That’s why we exclusively use ingredients and doses proven effective in peer-reviewed scientific studies on healthy men and women.
The ingredient, form, and dose in our creatine is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
Pulse is tested for purity and potency in an ISO 17025-accredited third-party laboratory, and independently certified to contain no contaminants or banned substances by Labdoor™.
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Waiver and Release of Liability
In consideration of the services and/or products offered by Legion Athletics, Inc. (“Legion”) including, but not limited to, nutrition plans, exercise routines and coaching, and in addition to the payment of any fee or charge:
I knowingly and voluntarily enter into this waiver and release of liability and hereby waive any and all rights, claims or causes of action of any kind whatsoever arising out of my use of Legion’s services and/or products, and I hereby release and hold harmless Legion and its consultants, officers, contractors, agents, owners and employees from any and all responsibility, liability, cost and expenses, including for injuries, damages or disorders (physical, metabolic, or otherwise), resulting from my use of Legion’s services and/or products.
I understand that fitness activities including, but not limited to, strength, flexibility, and cardiovascular exercise, with or without the use of equipment, are potentially hazardous activities that involve a risk of injury and even death, and I am voluntarily participating in these activities and using equipment and machinery with knowledge of the risks involved. I hereby agree to assume and accept any and all risks of injury or death related to said fitness activities.
I understand Legion’s services and products are not meant to treat or manage any health conditions or circumstances, and I acknowledge that Legion has recommended I obtain a healthcare provider’s approval for my use of Legion’s services and/or products, through regular physical examination(s) and/or consultation. I acknowledge that I have obtained my healthcare provider’s approval or have decided to use Legion’s services and/or products without such approval and hereby assume all responsibility for my use of said services and/or products.
I understand that results from using Legion’s products and/or services are not guaranteed, and I agree to not hold Legion liable for any outcomes or lack thereof.
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Legion's Scientific Review Process
Legion's content is fact-checked and reviewed by a team of scientific, medical and subject-matter experts to ensure everything we publish is evidence based, trustworthy, and current.
If you don’t absolutely love this product, you get a prompt and courteous refund. No forms or returns necessary.
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Tested for purity and potency in a state-of-the-art ISO 17025 accredited lab by Labdoor™, the gold standard of third-party lab testing.
HMB tested in an ISO 17025-accredited third-party laboratory for heavy metals, microbes, allergens, and other contaminants to ensure compliance with FDA purity standards.
This product doesn’t just “contain natural ingredients”—every ingredient is naturally sourced from plants and animals. This product contains no artificial or synthetic sweeteners or flavors of any kind.
The ingredient, form, and dose in our supplement is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
Our supplement contains no artificial food dyes, fillers, or other unnecessary junk.
Because while these ingredients may not be as dangerous as some people claim, studies show they can cause negative effects in some people, including gastrointestinal toxicity and behavioral disorders.
That’s why we use natural coloring derived from fruits and other foods as well as naturally derived ingredients for enhancing shelf life and facilitating the manufacturing process.
Our scientific review board of nutritionists, dietitians, molecular biologists, doctors, and other accredited experts is responsible for reviewing every article, podcast, and video we produce to ensure they’re evidence based, accurate, trustworthy, and current.
Thanks to their connections, credentials, and academic experience, this team of MDs, PhDs, and other professionals has access to a wealth of research published in the largest and most prestigious journals in the world.
This allows them to not only review individual studies but also analyze the overall weight of the evidence on any and all topics related to diet, exercise, supplementation, and more.
If you feel that any of our content is inaccurate, misleading, out-of-date, or anything less than factual, please let us know in the comments section of the article in question.
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