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.*

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.

Real People, Real Reviews

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Total 5 star reviews: 983 Total 4 star reviews: 104 Total 3 star reviews: 60 Total 2 star reviews: 25 Total 1 star reviews: 26
Customers Talked About
Reviews Summary
Customers say this powder mixes easily and tastes pleasant without being overly sweet. Many report noticeable improvements in regularity and reduced bloating within days to weeks. Users appreciate the convenient sachets for travel and consistently mention feeling calmer digestion. Most describe it as becoming an essential daily routine, with some noting they miss it when they skip doses. A few report initial adjustment periods or that results take longer to appear.
1,198 reviews
  • Chloe D.
    Verified Reviewer
    I recommend this product
    Rated 5 out of 5 stars
    3 hours ago
    Great Customer Service

    38TERA's customer service is absolutely incredible. I have nothing but great things to say especially about Gabi!

  • Vanessa S.
    Flag of United States
    Verified Buyer
    I recommend this product
    What are you hoping to improve? Pick one that describes you best. Diarrhea
    Rated 4 out of 5 stars
    14 hours ago
    I feel better

    I feel better on the 38tera then I did before starting it. I still have more gas and loose stools than I would like, but it is much improved.

  • Darby G.
    Verified Reviewer
    I recommend this product
    Rated 5 out of 5 stars
    17 hours ago
    The kindest, most sincere people

    I have purchased hundreds of things online and have never encountered the kindness, grace, patience, and sincerity of any group of people in my life. I canceled my subscription to direct my money into helping my brother through chemotherapy. Josef understood immediately and sent the most touching note to me. Human compassion is healing and Josef is my healing connection to 38TERA. I am so grateful to be seen as a person and not just a customer.

  • Thomas
    I recommend this product
    Rated 5 out of 5 stars
    19 hours ago
    5 Stars

    Quick ship. Have reordered mutiple times. Great taste. Dissolves wonderfully.

  • Sandra C.
    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
    Finally under control

    After taking 38 Terra for two years now I feel better than I ever have at age74. Just one glass of this drink and I finally do not need any laxatives to keep me regular . This drink is magic!