TEST Persona Landing

Q: How is DMN different from a probiotic or fiber supplement?

DMN is a Daily Microbiome Nutrition prebiotic formula — designed to feed and support the entire microbial ecosystem, not just introduce isolated strains (probiotics) or add bulk fiber alone. The formulation targets the bacteria you already have, providing the specific nutrients they need to function well and multiply. It's a fundamentally different approach: input-based, not intervention-based.

★★★★★ PERSONA OVERRIDE ✅ · Built for athletes

Your gut is the engine. Fuel it.

Most gut supplements add bacteria. DMN® feeds the ones you already have. Gastroenterologist formulated. Clinically dosed. One daily habit.

✓ Less than $2 a day. Built for consistency.

Fuel your gut

Third Party Tested

Gastroenterologist Formulated

Clinically-Dosed ingredients

THE MICROBIOME GAP

Your gut bacteria are starving.

Most supplements treat symptoms. DMN feeds the system behind them — the keystone bacteria driving your digestion, immunity, and energy.

95%

of Americans are deficient in dietary fiber

80%

of Americans don't meet recommended polyphenol intake

4g

Average daily resistant starch intake (Target: 15g+)

1 in 5

Adults experience chronic digestive issues rooted in microbiome imbalance

DR. WILL BULSIEWICZ, MD, GASTROENTEROLOGIST, 38TERA® CO-FOUNDER

"Most people feed themselves. Not their microbiome. I built 38TERA® to change that."

Clinically Dosed

Every formula built with ingredients at the exact doses the research supports.

Microbiome-First

We design supplements that feed your gut bacteria, because a healthy microbiome supports total-body wellness.

Science Meets Practice

Independent research. Real-world patient outcomes. We formulate for what the evidence shows works.

Tested to The Highest Standard

Verified for purity, potency, and safety across 280+ substances through NSF Certified for Sport® .

Explore The Science

4.7

Rated 4.7 out of 5 stars

1,283 Reviews

DMN®

Fuel, recovery, and gut resilience — every day

$79.95

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. Nourishes your microbiome

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What To Expect

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.*

How DMN® Compares

Not another gut supplement. A different category.

Most gut products address one symptom. DMN addresses the underlying system — the microbiome itself.

Feeds your existing gut bacteria

Partially

Clinically dosed ingredients

Rarely

Sometimes

GI doctor formulated

Fiber + resistant starch + polyphenols in one formula

NSF® certified + third-party tested

Certified FODMAP friendly

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

38TERA® is held to the highest quality and safety standards at every stage — from raw ingredient to finished product. Not selectively.

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

What's on the label is what's in the formula. The clinical doses are exactly what the research supports.

Manufacturing Audit

Produced in facilities meeting the strictest GMP requirements. Sourced and made with intention at every stage.

VIEW OUR QUALITY STANDARDS

Train your gut like you train everything else.

Consistency is the protocol. DMN is the daily input your training has been missing.

Start the protocol

FAQS

You've got questions. We have answers.

How is DMN different from a probiotic or fiber supplement?

DMN is a Daily Microbiome Nutrition prebiotic formula — designed to feed and support the entire microbial ecosystem, not just introduce isolated strains (probiotics) or add bulk fiber alone. The formulation targets the bacteria you already have, providing the specific nutrients they need to function well and multiply. It's a fundamentally different approach: input-based, not intervention-based.

What makes 38TERA different from other gut health brands?

38TERA was co-founded by two complementary experts: Dr. Will Bulsiewicz, a board-certified gastroenterologist and leading microbiome researcher, and Simon Hill, a nutrition scientist known for translating peer-reviewed research into real-world practice. Every formula starts with the primary literature — ingredients at the doses the studies actually used, not the doses that look good on a label. That rigor shows up in the details: NSF Certified for Sport®, Certified Low FODMAP, and third-party tested every single batch.

How will I know if it's working?

Many people notice improvements within the first 3-5 days, including steadier energy, reduced bloating, and better digestion. However, everyone's microbiome is unique. Some may experience benefits sooner, while others may need consistent daily use for 2-3 weeks to feel the full effects. Because DMN works by feeding and supporting your existing bacteria — not introducing new ones — the changes are gradual and sustainable, not dramatic and short-lived.

What does it taste like?

Wild Berry. It's pleasant and easy to drink — just tear, pour into water, and stir. No artificial sweeteners, no chalky texture. Most people genuinely enjoy it as part of their morning routine.

Is DMN safe to take every day?

Yes. DMN is formulated for daily use and is Certified Low FODMAP — meaning it's validated even for people with IBS and sensitive digestive systems. It's NSF Certified for Sport®, independently tested for purity and safety across 280+ substances. As with any supplement, if you have a specific medical condition or are taking medications, consult your healthcare provider before starting.

Can I cancel my subscription anytime?

Absolutely. You can cancel, pause, or modify your subscription at any time through your account dashboard or by contacting our support team. There are no cancellation fees or penalties. We're here for the long term, but only if DMN® is working for you.

Not satisfied? 30-day money-back guarantee. Contact us within 30 days of your first purchase.

Real People, Real Reviews

Slide 1 selected

Total 5 star reviews: 1.1k

Total 4 star reviews: 110

Total 3 star reviews: 61

Total 2 star reviews: 25

Total 1 star reviews: 27

Customers Talked About

Reviews Summary

Customers say this prebiotic powder improves regularity and reduces bloating, with many noticing changes within days to weeks. Users report better digestion, increased energy, and easier bowel movements. The berry-flavored drink mixes well and tastes pleasant. Many appreciate the convenient single-serve packets for travel. Some note the powder settles and requires stirring. A few mention it's pricey but worth the investment. Overall, customers find it effective for supporting digestive comfort and consistency.

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1,283 reviews

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Lindsay
Verified Reviewer
I recommend this product
Rated 5 out of 5 stars
2 hours ago
Consistency is key
Five years ago I had a tumour removed from my pancreas via Whipple surgery, which has caused havoc with my gut and I am very prone to diarrhoea. It was the tumour that sent me down a rabbit hole where I discovered Dr B so of course when he brought out DMN, I knew I had to try it. I have found that when I take DMN daily, my stools are firm (excuse the details) but when I am inconsistent, so is my digestion. I would recommend DMN to anyone, but feel it’s essential to anyone that has had some form of gastric surgery
Was this helpful?
Jacqueline L. L.
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
4 hours ago
Game changer!
So happy with the product! It has helped me to achieve regularity. Feeling so much better since I started using it.
Was this helpful?
Susan D.
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
7 hours ago
After two years, I’m still using it daily.
That says it all! That is my stamp of approval.
I have progressed from gut microbiome issues and food intolerances, and now I just want to maintain that beautiful balance😊
Was this helpful?
Kimberly K.
Verified Buyer
I recommend this product
Rated 4 out of 5 stars
8 hours ago
So Far so Good
After my doctor suggested I read 'Fiber Fueled' last year, I've been reading and listening to Dr. B through podcasts, books and emails. I am so thankful for the insight he has shared. When I saw that he had created 38Tera I thought I'd give it a try. After taking various fiber powders and needing 6 orange fiber caplets each day, (that no longer worked well) I am thankful to take 2 teaspoons of DMN and 1 capsule of RCE each evening. I have found that I have less bloating and cramping and 'things are moving better'.
Was this helpful?
Ellen F.
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
10 hours ago
It really works!
For the most part, I eat pretty clean. But I still had digestive problems after eating some foods, gas, bloating, etc. From the day I started taking 38Tera DMN, those problems have disappeared.
Was this helpful?

"Most people feed themselves. Not their microbiome. I built 38TERA® to change that."

DMN®

Sold out

Your microbiome starts changing within 24 hours

Not another gut supplement. A different category.

Built around your microbiome

Solnul® Resistant Starch

Actazin® Green Kiwifruit

Inavea™ Baobab & Acacia

Eevia Lingonberry

Beetroot

Mango

What consistency feels like.

You've got questions. We have answers.