DMN
DMN
DMN
DMN
DMN
GI Doctor-Founded

DMN

DAILY MICROBIOME NUTRITION
4.7
Rated 4.7 out of 5 stars
1,382 Reviews

A daily gut health formula designed to reduce bloating, improve regularity, and feed your microbiome. Backed by science, formulated by a gastroenterologist.

Reduces bloating and supports regularity*

Backed by an independent 15-day gut microbiome study

NSF® certified · FODMAP certified · third-party tested

Gentle on sensitive stomachs, powerful for your microbiome

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NSF Certified for Sport®
30-Day Money-Back Guarantee
Dr. Will Bulsiewicz
Why Dr B recommends thisBoard-Certified Gastroenterologist · NYT Bestselling Author of Fiber Fueled

"Most people are feeding themselves — but not their microbiome. DMN® was built to close that gap. I designed this formula because nothing like it existed."

Dr. Will Bulsiewicz, MD, MSCI — Board Certified Gastroenterologist

Scientists study DMN:

Your microbiome starts changing within 24 hours

An independent M-SHIME® gut-model study tracked the measurable changes that happen when you take DMN® consistently. The data speaks for itself.

View the 15-Day Microbiome Study Results ➔

Day 1Acetate ↑ from 24hrs
First fermentation begins

Resistant starch reaches your colon and bacteria begin breaking it down. SCFA production starts almost immediately.

Day 3Acetate ↑12%
Steadier energy, fewer cravings

Short-chain fatty acids begin signalling your brain and metabolism. Acetate increases 12% — your gut is making clean fuel.

Day 5Ammonium ↓11%
Less bloating, clearer head

Ammonia (a gut irritant) drops 11% as beneficial bacteria begin crowding out fermenters that cause gas and discomfort.

Day 8Propionate ↑28%
Microbiome shift underway

Beneficial bacteria populations are measurably rising. Propionate climbs 28% — gut cells are getting well-fed, digestion smooths out.

Day 15TNFα ↓ · Akkermansia ↑
Akkermansia takes charge

Your gut's guardian bacterium rises to prominence. TNFα drops — inflammation cools. This is the gut reset you've been building toward.

1 month+Long-term foundation
Deep repair and steady balance

Your microbiome enters a phase of sustained diversity. Long-term benefits — immunity, metabolism, mood — compound with consistent daily use.

†In an Independent M-SHIME® 15-day human gut-model study, DMN® supported microbial balance by increasing key short-chain fatty acids and reducing gut irritation markers. Not a human clinical trial.*

Built around your microbiome

Each ingredient is selected for a specific role in supporting microbial diversity, metabolic output, and digestive comfort.

Solnul® Resistant Starch

PREBIOTIC FUEL

3500mg

The clean fuel your gut cells and immune system run on.

Solnul® Resistant Starch

Consumption of Solnul® resistant potato starch produces a prebiotic effect in a randomized, placebo-controlled clinical trial. 
Nutrients 2023; 15(7), 1582.

Resistant potato starch supplementation reduces serum histamine levels in healthy adults with links to attenuated intestinal permeability.
Journal of Functional Foods Volume 108, September 2023, 105740

  • Dose provided in the amount proven in human clinical trials.
  • Resistant to digestive enzymes, it ferments in the large intestine, nourishing the microbiota.
  • A study on 75 healthy adults shows a significant increase in Akkermansia and Bifidobacterium over four weeks with a daily intake of 3.5g of Solnul®.
  • Solnul®: sustainably sourced, ancestral, evidence-based, low FODMAP, with proven prebiotic benefits.

Actazin® Green Kiwifruit

MOTILITY + DIVERSITY

600mg

Improves regularity and feeds Akkermansia directly.

Actazin® Green Kiwifruit

Actazin® green kiwifruit powder consumption at 600 mg per day for 28 days improves stool form and relieves occasional constipation in healthy individuals: a randomized controlled trial. 
Bioactive Carbohydrates and Dietary Fibre, 2024;32:100436.

Kiwifruit-derived supplements increase stool frequency in healthy adults: a randomized, double-blind, placebo-controlled study. 
Nutr Res J, 2015; 35:401-408

  • Kiwifruit is rich in fiber, multiple polyphenols , digestive enzymes (actinidin), organic acids, vitamins and minerals.
  • In two clinical studies, Actazin® 600mg significantly increased weekly bowel movements. 
  • On May 7, 2021, the European Food Safety Authority deemed that based on the scientific evidence, green kiwifruit helps in the maintenance of normal defecation. The effect of Actazin® 600mg is functionally equivalent.

2021 study: Actazin® 600mg daily significantly increased Faecalibacterium in mild constipation.

Inavea™ Baobab & Acacia

GUT LINING SUPPORT

500mg

Dual fiber — feeds Bifidobacteria and supports the mucosal barrier.

Inavea™ Baobab & Acacia

The Efficacy of Gum Arabic in Managing Diseases: A Systematic Review of Evidence-Based Clinical Trials.
Biomolecules. 2023 Jan 9;13(1):138.

Manipulation of Gut Microbiota Using Acacia Gum Polysaccharide.
ACS Omega. 2021 Jul 20; 6(28): 17782–17797.

Acacia Gum is a Bifidogenic Dietary Fibre with High Digestive Tolerance in Healthy Humans.
Microbial Ecology in Health and Disease, 15:1, 43-50.

Adansonia digitata L. (Baobab) Bioactive Compounds, Biological Activities, and the Potential Effect on Glycemia: A Narrative Review.
Nutrients. 2023 May; 15(9): 2170.

A Pectin-Rich, Baobab Fruit Pulp Powder Exerts Prebiotic Potential on the Human Gut Microbiome In Vitro.
Microorganisms. 2021 Sep 17;9(9):1981.

  • A blend of two ancestral soluble dietary fibers, Acacia and Baobab. 
  • Source of bioactives such as gallic acid, (-)-epicatechin, epicatechin-3-gallate, procyanidin B2, tannins and carotenoids
  • In an ex-vivo simulation of the human intestinal microbial ecosystem, 5g of the combination of Acacia + Baobab were found to exert significant prebiotic activity. The study showed the promotion of beneficial bacteria, including the Bifidobacterium spp., and specific bacteria families such as Akkermansiaceae and Christensenellaceae.Note that the trial was ex vivo and at a different dose, but these results along with other studies support the prebiotic nature of both Baobab and Acacia fiber.
  • Certified Low FODMAP.

Eevia Lingonberry

POLYPHENOL POWERHOUSE

250mg

Hand-harvested in Finland. Highest antioxidant content of any berry.

Eevia Lingonberry

Lingonberry (Vaccinium vitis-idaea L.) Fruit as a source of bioactive compounds with health promoting effects - a review. 
Int J Mol Sci 2021; 22(10):5126

Lingonberries alter the gut microbiota and prevent low-grade inflammation in high-fat diet fed mice. 
Food Nutr Res 2016;60:29993

Lingonberries and their two separated fractions differently alter the gut microbiota, improve metabolic functions, reduce gut inflammatory properties, and improve brain function in ApoE-/-mice fed high-fat diet. 
Nutr Neurosci 2020;23(8):600-612

  • Wildcrafted and hand harvested from certified organic nordic forests.
  • Lingonberry boasts the highest polyphenol/antioxidant (ORAC) value among berries.
  • Contains polyphenols like proanthocyanidins, catechin, and epicatechin, supporting gut health and metabolic functions.
  • Animal model studies indicate that the polyphenols in lingonberries alter the gut microbiota and reduce inflammation.

Beetroot

INFLAMMATION SUPPORT

190mg

Reduces inflammatory markers and supports liver health.

Beetroot

The Potential Benefits of Red Beetroot Supplementation in Health and Disease.
Nutrients. 2015 Apr; 7(4): 2801–2822.

A review on bioactive compounds of beet (Beta vulgaris L. subsp. vulgaris) with special emphasis on their beneficial effects on gut microbiota and gastrointestinal health
Crit Rev Food Sci Nutr. 2021;61(12):2022-2033.

Effect of two-week red beetroot juice consumption on modulation of gut microbiota in healthy human volunteers - A pilot study.
Food Chem. 2023 Apr 16:406:134989.

  • Ideally grown in the fertile soils and cool temperatures of Poland as part of a centuries old food tradition.
  • Source of multiple bioactive phytochemicals including betalains, flavonoids, polyphenols, Saponins and inorganic nitrate.
  • Research indicates that beets contain a variety of bioactive compounds with the potential to positively alter the gut microbiota.

Mango

MICROBIOME DIVERSITY

155mg

Broadens the feeding spectrum. More diversity, more resilience.

Mango

Mango (Mangifera indica L.) Polyphenols: Anti-Inflammatory Intestinal Microbial Health Benefits, and Associated Mechanisms of Actions.
Molecules. 2021 May; 26(9): 2732.

Mango Supplementation Modulates Gut Microbial Dysbiosis and Short-Chain Fatty Acid Production Independent of Body Weight Reduction in C57BL/6 Mice Fed a High-Fat Diet
J Nutr. 2016 Aug;146(8):1483-91.

Prebiotic effect of predigested mango peel on gut microbiota assessed in a dynamic in vitro model of the human colon (TIM-2).
Food Res Int. 2019 Apr:118:89-95.

  • Polyphenols including mangiferin, benzoic acid, gallic acid, gallate, ellagic acid as well as quercetin.
  • Several studies indicate that mango polyphenols have prebiotic effects and the potential to lower intestinal inflammation and promote intestinal barrier integrity.

NSF Certified for Sport®. The industry's highest bar.

SIMON HILL, 38TERA® CO-FOUNDER

NSF Certified for Sport® is not a marketing badge. It is an independent certification program that tests supplements for 280+ banned substances. Every batch of DMN® is tested under this protocol — not once at launch, but every production run before anything ships.

280+ Banned Substances

280+ substances prohibited across professional and elite sport — tested per batch. WADA, NFL, MLB, NBA, and PGA compliant.

Contaminant Testing

Heavy metals, pesticides, and microbiological hazards — tested in raw materials and in the finished product before any batch is released.

Label Accuracy

Every active ingredient confirmed at the dose stated on the label — independently tested, not self-declared by the brand.

Manufacturing Audit

Facility standards independently audited: raw material sourcing, in-process controls, and finished product release protocols.

Learn more about our standards

Real People, Real Reviews

Slide 1 selected
Customers Talked About
Reviews Summary
Customers say this fiber supplement improves digestive regularity and reduces bloating. Many report better bowel movements within weeks of consistent use. Common feedback includes reduced gas, improved comfort, and easier digestion. Users appreciate the pleasant berry flavor and convenient travel packets. Some note it takes time to see results, while a few experienced no significant change or found the price steep.
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1,382 reviews
  • kristen h.
    Flag of United States
    Verified Buyer
    I recommend this product
    What are you hoping to improve? Pick one that describes you best. Bloating
    Rated 5 out of 5 stars
    4 minutes ago
    Consistency is what I love

    I've been using this product for 3 months now. I noticed a positive change after 3 weeks. My ease and consistency in going was amazing!! The taste is good. I've gotten used to the powdery texture. Plus, I used to get bloated by late afternoon every day. That has gone away!

    Was this helpful?
  • Ginger H.
    Flag of United States
    Verified Buyer
    I recommend this product
    What are you hoping to improve? Pick one that describes you best. Constipation
    Rated 5 out of 5 stars
    Yesterday
    38 Terra

    Good results. Experimenting with 38 terra to see if I need to take it daily. Adding information that I received from the constipation class recently given by Dr. B. Adding kiwi, water, prunes , more fruit and vegetables to my daily diet. Thanks for the help. Ginger

    Was this helpful?
  • Andrea L.
    Verified Reviewer
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Already feel a difference

    I'm on day 4 of using DMN and I can already feels and see a difference. My bowel movements are more frequent, softer, and aren't causing me any discomfort. I've struggled for years and been under the care of a GI but have only found temporary relief here and there. I'm really hopeful this product continues to send me in the right direction!

    Was this helpful?
    3 Profile picture for 38TERA
    38TERA
    21 hours ago

    Andrea, thank you for sharing this! Day 4 is such an exciting place to be, and we love that you're already noticing a difference. After years of searching for relief, that hope means a lot. Consistency is key with DMN, so we're cheering you on as you keep going. Here's to continued progress on your gut health journey!

  • Karrie N.
    Flag of United States
    Verified Buyer
    I recommend this product
    What are you hoping to improve? Pick one that describes you best. Gut microbiome
    Rated 5 out of 5 stars
    Yesterday
    Amazing! My MEMORY and ENERGY is SO much better! I feel STRONGER and SLIMMER!

    I was taking another pre/pro biotic before but I just didn’t feel better. When 38Tera became available I immediately switched. I am very pleased with the results! I now have my husband taking it. He has inflammatory arthritis and heart disease. I have noticed he moves better and seems to feel better as well. I have listened to Dr B for years on many podcasts and trust his product.

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  • Cathy F.
    Flag of United States
    Verified Buyer
    I recommend this product
    What are you hoping to improve? Pick one that describes you best. Bloating
    Rated 5 out of 5 stars
    Yesterday
    38 Tera DMN

    Seems to help with hydration and bloating

    Was this helpful?