DMN®
DMN®
DMN®
DMN®
DMN®
DMN®
DMN®
DMN®
DMN®
DMN®
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 dissolves easily, tastes great, and helps them feel more regular with consistent bowel movements. Many appreciate the pleasant flavor and how it mixes smoothly into drinks. Common feedback includes reduced bloating, improved digestion, and better overall energy levels. Most users report noticing improvements within weeks of consistent daily use. A few mention it works best when combined with dietary changes and adequate water intake. Some note the price is a consideration, while a small number report minimal personal results despite consistent use.
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1,480 reviews
  • David B.
    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 4 out of 5 stars
    3 minutes ago
    Noticeable difference

    This made a noticeable difference in my gut health, and I have been using various prebiotics for years. My two complaints are that you need to get the clumping figured out and there is absolutely no need for sweeteners.

    Was this helpful?
  • Kathy 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
    2 hours ago
    Very helpful

    My gut has been upset for so many months!

    I started slow with 38tera and it has put my gut back to feeling sooo much better!

    Was this helpful?
  • Francesca F.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    16 hours ago
    Perfect For On-The-Go

    I was waiting for this product to become available in a size that was easier to manage when traveling both in the US as well as overseas. I was very happy to see this product become available recently in travel size. They are perfectly sized to slip into your carry-on, checked baggage or purse. There is no excuse to NOT get your daily DMN. I plan to bring these when I go to Europe next year.

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  • Barbara S.
    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
    22 hours ago
    DMN

    I love this!

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  • Wendy S.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Use it every day!

    Working on repairing gut health. Love this product. Take it every morning with creatine. Easily dissolves and tastes good! Listen to a lot of functional medicine podcasts. One recommended 38 Tera. It’s a winner!

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