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 Biome “power wash” your gut and automagically eradicate acne, allergies, and asthma?
No.
Will it supercharge your metabolism and flatten your stomach in 30 days?
Absolutely not.
But will Biome improve nutrient absorption, reduce stomach pain and bloating, and decrease intestinal and whole-body inflammation?
Yes. Or your money back.
- Total formulation transparency (no proprietary blends)[8]
- Made in the USA with globally sourced ingredients in NSF-certified and FDA-inspected facilities that adhere to Current Good Manufacturing Practice standards
- Backed by our “No Return Necessary” money-back guarantee that works like this: If you don’t absolutely love Biome, just let us know, and we’ll give you a full refund on the spot. No forms or returns necessary.
So order now, try Biome risk free, and see for yourself why we believe it’s the perfect probiotic supplement.
Will Biome “power wash” your gut and automagically eradicate acne, allergies, and asthma?
No.
Will it supercharge your metabolism and flatten your stomach in 30 days?
Absolutely not.
But is Biome the only[1] natural[2] probiotic supplement with clinically effective doses[3] of 4 ingredients scientifically shown[4] to improve digestive health and function and promote a leaner body composition?
And will it improve nutrient absorption, reduce stomach pain and bloating, and decrease intestinal and whole-body inflammation?
Yes. Or your money back.
- 19 peer-reviewed scientific studies support Biome's combination of ingredients and doses[5]
- Contains no artificial fillers, food dyes, or other chemical junk[6]
- Analyzed for purity and potency in a state-of-the-art ISO 17025 accredited lab[7]
- Total formulation transparency (no proprietary blends)[8]
- Made in the USA with globally sourced ingredients in NSF-certified and FDA-inspected facilities that adhere to Current Good Manufacturing Practice standards
Biome is also backed by our “No Return Necessary” money-back guarantee that works like this:
If you don’t absolutely love Biome, just let us know, and we’ll give you a full refund on the spot. No forms or returns necessary.
So order now, try Biome risk free, and see for yourself why we believe it’s the perfect probiotic supplement.
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.
Legion Biome Ingredients (1,192 milligrams per serving)
Bifidobacterium lactis B420® (10 billion CFU per serving)
Bifidobacterium lactis B420® is a strain of probiotic bacteria that reduces the production of toxic compounds that are produced by harmful intestinal bacteria and can cause inflammation throughout the body.[9]
Bifidobacterium lactis B420® also boosts levels of healthful bacteria in the digestive tract as well as concentrations of a protein called GLP-1 that influences the release of insulin from the pancreas (and thus glucose control) and other hormones that impact appetite.[10][11]
Research shows supplementation with Bifidobacterium lactis B420® . . .
- Decreases intestinal inflammation[12]
- Reduces food intake and promotes fat loss (particularly in the stomach region) and weight maintenance through mechanisms not fully understood yet, but possibly related to improvements in the function of the gut barrier[13]
- May improve the function of the gut barrier, which controls the absorption of nutrients, electrolytes, and water, as well as the containment and elimination of toxins and pathogens[14][15][16]
The clinically effective dose of Bifidobacterium lactis B420® is 10 billion CFU.
Bacillus subtilis DE111® (5 billion CFU per serving)
Bacillus subtilis DE111® is a strain of probiotic bacteria that increases the production of white blood cells in response to inflammation, positively influences hormones related to satiety (fullness), and boosts levels of healthy bacteria in the digestive tract.[17][18][19]
Research shows supplementation with Bacillus subtilis DE111® . . .
- Increases the body’s ability to fight off infections[20]
- Reduces whole-body inflammation levels[21]
- Improves cholesterol levels and blood vessel function[22]
- May promote fat loss through mechanisms not fully understood yet, but possibly related to improvements in the function of the gut barrier[23]
The clinically effective dose of Bacillus subtilis DE111® is 5 billion CFU.
Lactobacillus plantarum 299v® (10 billion CFU per serving)
Lactobacillus plantarum 299v® is a strain of probiotic bacteria that improves the function of the gut barrier, which controls the absorption of nutrients, electrolytes, and water, as well as the containment and elimination of toxins and pathogens.[24]
Lactobacillus plantarum 299v® also reduces the levels of “bad” bacteria in the digestive system and enhances the production of short-chain fatty acids, which nourish intestinal cells.[25]
Research shows supplementation with Lactobacillus plantarum 299v® . . .
- Reduces abdominal pain, cramping, bloating, and flatulence[26][27]
- Improves symptoms of Irritable Bowel Syndrome (IBS)[28][29]
- Improves the body’s ability to absorb iron[30]
The clinically effective dose of Lactobacillus plantarum 299v® is 10 billion CFU.
PreticX® Xylooligosaccharide (1,000 milligrams per serving)
A prebiotic is a form of non-digestible fiber that serves as food for beneficial gut bacteria, helping them grow faster and replace the “bad” bacteria in your digestive system. A xylooligosaccharide is a form of prebiotic that’s naturally found in fruit, vegetables, milk, and honey.
We chose PreticX® xylooligosaccharide specifically because studies show that it’s effective at lower doses than most other prebiotics.[31]
Research shows supplementation with PreticX® xylooligosaccharide . . .
- Increases levels of healthy intestinal bacteria[32]
- Reduces the growth of gut bacteria that cause inflammation and are associated with an increased risk of type-2 diabetes[33]
The clinically effective dose of PreticX® xylooligosaccharide is 1,000 milligrams.
No Artificial Food Dyes, Fillers, or Other Unnecessary 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.[34][35][36][37][38]
Third-Party Lab Tested for Potency & Purity
Every bottle of Biome 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.
See how Legion Biome compares to the rest.
- Active Ingredients
- Clinically Effective Ingredients & Doses
- Bifidobacterium lactis
- Bacillus subtilis
- Lactobacillus plantarum
- Xylooligosaccharide
- Third-Party Lab Tested
- Labdoor Certified Brand
- Price Per Serving
-
Legion Biome
Probiotic
- 1,192 mg
per serving 
- 10 billion CFU
per serving - 5 billion CFU
per serving - 10 billion CFU
per serving - 1,000 mg
per serving - $
-
Transparent Labs
Probiotic
- 1,000 mg
per serving 
- 10 billion CFU
per serving - 10 billion CFU
per serving - $1.53
-
Garden of Life
Probiotic
- 625 mg
per serving 
(proprietary blend)
(proprietary blend)- $1.43
-
NOW Foods
Probiotic-10
- 640 mg
per serving
(proprietary blend)
(proprietary blend)- $1.50
The #1 brand of natural sports supplements.
5+ million bottles sold to 1+ million customers who have left us 45,000+ 5-star reviews.
Natural Ingredients
Biome 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
Every ingredient in Biome is backed by peer-reviewed scientific research demonstrating clear benefits in healthy humans.
Clinically Effective Ingredients & Doses
Every ingredient in Biome is included at clinically effective levels, which are the exact amounts shown to be safe and effective in peer-reviewed scientific research.
Third-Party Lab Tested
Biome is tested by third-party labs for heavy metals, microbes, allergens, and other contaminants to ensure it meets FDA purity standards.
Made in the USA
Biome is made in America with globally sourced ingredients in NSF-certified, FDA-inspected facilities that adhere to Current Good Manufacturing Practice (cGMP) standards.
"No Return Necessary"
Money-Back Guarantee
If you don't absolutely love Biome, you get a prompt and courteous refund. No forms or returns necessary.
Trusted by scientists, doctors, and everyday fitness folk alike.
Frequently Asked Questions
+References
Most popular probiotics are all-natural. Some contain the right mix of high-quality bacteria strains. Some provide clinically effective doses. But only Biome checks each of these boxes. ↑
Biome doesn’t just “contain natural ingredients''—every ingredient is naturally sourced. Biome contains no artificial or synthetic substances of any kind. ↑
Every serving of Biome contains 1,192 milligrams of active ingredients that have been shown to be safe and effective in peer-reviewed scientific research. ↑
Every active ingredient in Biome is backed by published scientific studies that show benefits in healthy humans. ↑
That’s 250 pages of scientific research that shows Biome works exactly like we say it does. ↑
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 Biome. ↑
Every bottle of Biome is guaranteed to provide exactly what the label claims and nothing else—no heavy metals, microbes, allergens, or other contaminants. ↑
This means you know exactly what’s in every serving of Biome—every dose of every ingredient—and can verify the accuracy and efficacy of the formulation. ↑
Hibberd AA, Yde CC, Ziegler ML, et al. Benef Microbes. 2019;10(2):121-135. doi:10.3920/BM2018.0028.↑
Uusitupa HM, Rasinkangas P, Lehtinen MJ, et al. Nutrients. 2020;12(4):892. Published 2020 Mar 25. doi:10.3390/nu12040892.↑
Stenman LK, Lehtinen MJ, Meland N, et al. EBioMedicine. 2016;13:190-200. doi:10.1016/j.ebiom.2016.10.036.↑
Hibberd AA, Yde CC, Ziegler ML, et al. Benef Microbes. 2019;10(2):121-135. doi:10.3920/BM2018.0028.↑
Everard A, Belzer C, Geurts L, et al. Proc Natl Acad Sci U S A. 2013;110(22):9066-9071. doi:10.1073/pnas.1219451110.↑
Stenman LK, Lehtinen MJ, Meland N, et al. EBioMedicine. 2016;13:190-200. doi:10.1016/j.ebiom.2016.10.036.↑
Freedman KE, Hill JL, Wei Y, et al. Int J Mol Sci. 2021;22(5):2453. Published 2021 Feb 28. doi:10.3390/ijms22052453. ↑
Toohey JC, Townsend JR, Johnson SB, et al. J Strength Cond Res. 2020;34(11):3173-3181. doi:10.1519/JSC.0000000000002675.↑
Colom J, Freitas D, Simon A, et al. Front Microbiol. 2021;12:715863. Published 2021 Aug 2. doi:10.3389/fmicb.2021.715863.↑
Freedman KE, Hill JL, Wei Y, et al. Int J Mol Sci. 2021;22(5):2453. Published 2021 Feb 28. doi:10.3390/ijms22052453.↑
Townsend JR, Bender D, Vantrease WC, et al. Sports (Basel). 2018;6(3):70. Published 2018 Jul 26. doi:10.3390/sports6030070.↑
Trotter RE, Vazquez AR, Grubb DS, et al. Benef Microbes. 2020;11(7):621-630. doi:10.3920/BM2020.0039.↑
Toohey JC, Townsend JR, Johnson SB, et al. J Strength Cond Res. 2020;34(11):3173-3181. doi:10.1519/JSC.0000000000002675.↑
Nordström EA, Teixeira C, Montelius C, Jeppsson B, Larsson N. Benef Microbes. 2021;12(5):441-465. doi:10.3920/BM2020.0191.↑
Johansson ML, Nobaek S, Berggren A, et al. Int J Food Microbiol. 1998;42(1-2):29-38. doi:10.1016/S0168-1605(98)00055-5.↑
Ducrotté P, Sawant P, Jayanthi V. World J Gastroenterol. 2012;18(30):4012-4018. doi:10.3748/wjg.v18.i30.4012.↑
Ortiz-Lucas M, Tobías A, Saz P, Sebastián JJ. Rev Esp Enferm Dig. 2013;105(1):19-36. doi:10.4321/s1130-01082013000100005.↑
McKenzie YA, Thompson J, Gulia P, Lomer MC; (IBS Dietetic Guideline Review Group on behalf of Gastroenterology Specialist Group of the British Dietetic Association). J Hum Nutr Diet. 2016;29(5):576-592. doi:10.1111/jhn.12386.↑
Sniffen JC, McFarland LV, Evans CT, Goldstein EJC. PLoS One. 2018;13(12):e0209205. Published 2018 Dec 26. doi:10.1371/journal.pone.0209205.↑
Hoppe M, Önning G, Hulthén L. PLoS One. 2017;12(12):e0189141. doi:10.1371/JOURNAL.PONE.0189141.↑
Finegold SM, Li Z, Summanen PH, et al. Food Funct. 2014;5(3):436-445. doi:10.1039/c3fo60348b.↑
Finegold SM, Li Z, Summanen PH, et al. Food Funct. 2014;5(3):436-445. doi:10.1039/c3fo60348b.↑
Yang J, Summanen PH, Henning SM, et al. Front Physiol. 2015;6:216. Published 2015 Aug 7. doi:10.3389/fphys.2015.00216.↑
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. ↑
Kanarek RB. Department of Psychology, Tufts University, Medford, Massachusetts, USA. Nutr Rev. 2011 Jul;69(7):385-91. ↑
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. ↑
