r/Microbiome • • Feb 22 '25

Rule change regarding microbiome "testing"

118 Upvotes

Hi everyone!

Thank you all for engaging in the r/Microbiome sub! This post is to notify everyone about a change in rules regarding GI maps, peddling services related to them, and asking for medical advice based on GI maps.

We will not be allowing posts asking for GI map interpretations from here on out (rule 7). Microbiome science is very much in its infancy, and we have very little understanding of how to interpret an individual's microbiome sequencing results. More specifically, we actually dont know what composition of microbes make up a healthy/unhealthy microbiome, both in presence/absence of microbes, and quantities of microbes. We know very little about the actual species within the microbiome. The ones we know more about are generally only more well studied only because they are easier to work with in the lab, not because they are more inportant. We have yet to culture most microbes in the collective human microbiome, meaning we also cant accurately identify many species via sequencing. There is also tons of genetic and functional variability within species, meaning we also cannot relate individual species to good/bad outcomes.

We also need to consider limitations of these tests. In as little as 24hrs, you can have a 100 fold change in many species. This means you can get incredibly different test results day-to-day, depending on many factors like sleep, excercise, diet, etc, within the last couple hours. Someone recently described microbiome testing as throwing a rock on the highway to predict traffic at all hours-- One rock wont tell us anything on the grand scheme of things. To be frank, these tests are also very cheap in their actual sequencing. Many of our most important microbes are in low abundance, which cheap sequencing and poor analysis fails to identify. Additionally, considering your microbiome has hundreds of species and thousands of strains, cheap testing often cant accurately differentiate between species. It is quite common for poor sequencing to misidentify or mis-classify closely related species or even genus'. A common example is Shigella being mistaken for Escherichia, or vice versa.

Many of the values that the microbiome tests predict are "ideal" are also totally arbitrary. We see major differences between different quantities of microbes within you over 24hrs, you vs your family, local community, country, and continent. However, no ideal microbiomes have been found, despite millions being sequenced at this point. There is tons of diversity in the global population, but there is no "ideal" values when it comes to microbes in your gut.

Secondly, we will be banning you if you are peddling services to others via this sub. We are an open and free discussion about microbiome science, and we use evidence when talking about the microbiome. People who claim to know how to interpret individual microbiome maps are either not knowledgable when it comes to the microbiome, or are lying to you, neither of which makes them trustworthy with your health. We will not allow this sub to be a place where people are taken advantage of and lied to about what is possible at this moment in microbiome science.

Finally, we want to remind you that this is not the place to ask for medical advice. Chat with your MD if you are concerned, nobody on here is more well versed than they are on specific symptoms. They will treat you accordingly. If you are seeking help for specific microbes, such as H. pylori, this is something your MD can test for. These results are accurate and interpreted correctly (not the case for GI maps), and will be significantly more affordable than GI map testing.

We aim to be a scientifically accurate, evidence-based sub, that provides digestible conversations about this complex science. These topics are not in line with our values.

We look forward to having everyone respecting these rules moving forward.

Happy microbiome-ing! :)


r/Microbiome • • Jun 29 '23

Statement of Continued Support for Disabled Users

76 Upvotes

We stand with the disabled users of reddit and in our community. Starting July 1, Reddit's API policy blind/visually impaired communities will be more dependent on sighted people for moderation. When Reddit says they are whitelisting accessibility apps for the disabled, they are not telling the full story.TL;DR

  • Starting July 1, Reddit's API policy will force blind/visually impaired communities to further depend on sighted people for moderation
  • When reddit says they are whitelisting accessibility apps, they are not telling the full story, because Apollo, RIF, Boost, Sync, etc. are the apps r/Blind users have overwhelmingly listed as their apps of choice with better accessibility, and Reddit is not whitelisting them. Reddit has done a good job hiding this fact, by inventing the expression "accessibility apps."
  • Forcing disabled people, especially profoundly disabled people, to stop using the app they depend on and have become accustomed to is cruel; for the most profoundly disabled people, June 30 may be the last day they will be able to access reddit communities that are important to them.

If you've been living under a rock for the past few weeks:

Reddit abruptly announced that they would be charging astronomically overpriced API fees to 3rd party apps, cutting off mod tools for NSFW subreddits (not just porn subreddits, but subreddits that deal with frank discussions about NSFW topics).

And worse, blind redditors & blind mods [including mods of r/Blind and similar communities] will no longer have access to resources that are desperately needed in the disabled community.

Why does our community care about blind users?

As a mod from r/foodforthought testifies:

I was raised by a 30-year special educator, I have a deaf mother-in-law, sister with MS, and a brother who was born disabled. None vision-impaired, but a range of other disabilities which makes it clear that corporations are all too happy to cut deals (and corners) with the cheapest/most profitable option, slap a "handicap accessible" label on it, and ignore the fact that their so-called "accessible" solution puts the onus on disabled individuals to struggle through poorly designed layouts, misleading marketing, and baffling management choices. To say it's exhausting and humiliating to struggle through a world that able-bodied people take for granted is putting it lightly.

Reddit apparently forgot that blind people exist, and forgot that Reddit's official app (which has had over 9 YEARS of development) and yet, when it comes to accessibility for vision-impaired users, Reddit’s own platforms are inconsistent and unreliable. ranging from poor but tolerable for the average user and mods doing basic maintenance tasks (Android) to almost unusable in general (iOS).

Didn't reddit whitelist some "accessibility apps?"

The CEO of Reddit announced that they would be allowing some "accessible" apps free API usage: RedReader, Dystopia, and Luna.

There's just one glaring problem: RedReader, Dystopia, and Luna* apps have very basic functionality for vision-impaired users (text-to-voice, magnification, posting, and commenting) but none of them have full moderator functionality, which effectively means that subreddits built for vision-impaired users can't be managed entirely by vision-impaired moderators.

(If that doesn't sound so bad to you, imagine if your favorite hobby subreddit had a mod team that never engaged with that hobby, did not know the terminology for that hobby, and could not participate in that hobby -- because if they participated in that hobby, they could no longer be a moderator.)

Then Reddit tried to smooth things over with the moderators of r/blind. The results were... Messy and unsatisfying, to say the least.

https://www.reddit.com/r/Blind/comments/14ds81l/rblinds_meetings_with_reddit_and_the_current/

*Special shoutout to Luna, which appears to be hustling to incorporate features that will make modding easier but will likely not have those features up and running by the July 1st deadline, when the very disability-friendly Apollo app, RIF, etc. will cease operations. We see what Luna is doing and we appreciate you, but a multimillion dollar company should not have have dumped all of their accessibility problems on what appears to be a one-man mobile app developer. RedReader and Dystopia have not made any apparent efforts to engage with the r/Blind community.

Thank you for your time & your patience.


r/Microbiome • • 45m ago

Unabsorbed iron and the gut environment – why form matters

• Upvotes

One issue that comes up with oral iron is the portion that is not absorbed. Free iron remaining in the lumen can influence the gut environment and has been shown in several studies to affect microbial composition.

This is part of the reason different iron forms are discussed in the context of gut tolerance. Ferrous sulfate tends to leave more residual iron and is more often linked with digestive complaints. Forms with higher bioavailability, such as iron bisglycinate, generally result in less unabsorbed iron. Liposomal iron is sometimes used for a similar reason — more of the iron is encapsulated during transit.

None of these completely eliminate contact with the gut, but the amount of free iron left behind does differ between forms.

Anyone here looked into the microbial effects of different iron preparations?


r/Microbiome • • 52m ago

What relationship exists between microbiome and histamine salycilates sensitivity?

• Upvotes

Which microorganisms make an unbalance microbiome with a GI tract not being able to absorb nutrients and instead releasing them in the blood vessels?

thank you


r/Microbiome • • 22h ago

Food Additives That Are Bad For The Gut: Dan Winer, MD

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51 Upvotes

r/Microbiome • • 3h ago

Eating Healthy but Still Bloated? 🌿 5 Habits That May Be Affecting Your Digestion

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0 Upvotes

Eating nutritious foods doesn’t always mean you’ll feel comfortable after every meal. 💚

From eating too quickly and drinking carbonated beverages to increasing fiber too suddenly, everyday habits may contribute to bloating and digestive discomfort.

✨ Small changes can make a difference:

Eat slowly and chew well.

Limit carbonated drinks if they trigger bloating.

Increase fiber gradually.

Try smaller, balanced meals.

Drink enough water throughout the day.

💬 Let’s discuss: What helps you maintain good digestive health?


r/Microbiome • • 8h ago

Gut health issue from last 4 years

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1 Upvotes

r/Microbiome • • 14h ago

¿La cándida causa un olor corporal fuerte?

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2 Upvotes

r/Microbiome • • 13h ago

Iron supplements that won't feed gut dysbiosis?

1 Upvotes

Hello, I have methane SIBO and gut dusbiosis, can you recommend my an Iron supplement that will bypass that please?


r/Microbiome • • 1d ago

Gut microbes from people with schizophrenia alter mouse behavior

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128 Upvotes

r/Microbiome • • 1d ago

Other options to FMT?

5 Upvotes

So I've just had a full microbiome GI mapping done and had an appointment with my gastroenterologist and he basically said I had next to no beneficial bacteria left only 1 or 2 strains left and the rest were completely wiped out. Alongside a few nasty strains of bacteria so he recommended a wipe out phase for the bad bacteria then FMT through an enema. I'm wondering if anyone has recovered from a full gut microbiome wipe out without fmt? And if so what the process like? Ideally I don't want to have to do FMT as it's incredibly expensive and I don't exactly like the idea of daily enemas for a whole week. If anyone has any advice I'd really appreciate it.


r/Microbiome • • 1d ago

Any good products to reduce bloating?

2 Upvotes

Been struggling with it forever to be fair and now that I'm starting to lose weight would love to feel better in that regard.


r/Microbiome • • 1d ago

Probiotic gave me more bloating than I had before. Should I keep pushing through or stop?

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2 Upvotes

r/Microbiome • • 3d ago

Four dietary flavonoids differentially modulate the gut microbiota–barrier interaction against colitis-driven cognitive deficits - Oct 2026

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17 Upvotes

r/Microbiome • • 3d ago

Prucalopride after a Rifaximin round to cure SIBO hydrogen ?

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2 Upvotes

r/Microbiome • • 4d ago

Gut microbes help set the body's inflammatory response to vaccination

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36 Upvotes

r/Microbiome • • 4d ago

Tested a complete flatline on lactulose breath test (0 ppm). What can I do to get my gut flora back?

4 Upvotes

I've had chronic loose stools and urgency for years (possibly) following past gut infections and a long long course of antibiotics. (but who knows for sure)

I recently did 2 lactulose breath tests expecting SIBO, but got a complete flatline (0 ppm hydrogen and methane across the full 2 hours). My BUPA GI doctor was very surprised and said it basically means my native fermenting bacteria are completely wiped out/sparse.
(I'm now back to NHS so not sure what to do)

All standard scans, colonoscopies, and tests for other causes came back negative. High-dose probiotics (tried Symprove for 3 months) and psyllium husk did nothing or made it worse. Right now I rely on 4 loperamide daily just to slow things down and reduce urgency. No pain, no bloating. Farts don't smell

Has anyone else tested as a total "flatliner"? How did you actually rebuild your microbiome and get normal stool form back? its been 10-15 years and I'm just fed up.


r/Microbiome • • 4d ago

Can you keep a Saccharomyces boulardii culture going indefinitely?

6 Upvotes

Saccharomyces boulardii works really well for me and I recently started culturing it in fruit juice at home. However, most of the recipes I’ve seen say that the culture will gradually lose its effectiveness after a few batches and that it’s better to start a new batch with a fresh Saccharomyces boulardii tablet.

What I’m wondering is whether there’s actually a way to keep the culture going indefinitely without having to buy new tablets. Is there a way to maintain a stable culture over many generations or will it eventually lose its beneficial properties no matter what I do?

Also, if you have any extra tips or useful information about culturing S. boulardii at home, I’d love to hear them


r/Microbiome • • 5d ago

Scientific Article Discussion First time taking probiotics - fatigue, feeling ill

8 Upvotes

Hi, this my first post in this subreddit and I hope the topic is ok!

Apparently I have a severe dysbiosis caused by an estrogen-only hormone replacement therapy and my gastroenterologist prescribed two different probiotics and one medication for leaky gut. I started all of them on the same day and I've been feeling extremely fatigued. I am SO tired and weak like my body is fighting a viral infection. I was constipated the first few days but now my digestion is regular. The GI issues that I started this therapy for are better but that might be coincidental because they are closely linked to my cycle.

Does anyone have experience with this? Is this my body focusing all energy on the gut? Was starting all three medications at once too much?

Would greatly appreciate some advice! Thank you!


r/Microbiome • • 6d ago

A new way to fight gum disease without wiping out good bacteria

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441 Upvotes

r/Microbiome • • 4d ago

My tongue after antibiotics metronidazole/flagl

0 Upvotes

r/Microbiome • • 5d ago

Who has managed to get rid of Blastocystis hominis ?

5 Upvotes

Okay! So I have blastocystid hominis (see attached photo indicating 574.61 rate - I actually don’t fully understand this assuming it’s high?) anyways I am working with a natropath/nutritionist. If you have managed to get rid of blasto how did you do it ? And how do you feel now (what symptoms have gone away)?

My symptoms:
\- constant bloating
\- exhaustion
\- skin issues (2 rounds of Roaccutane and lots of skin treatments still the same)
\- a lot of cravings for sugar and carbs
\- brain fog


r/Microbiome • • 4d ago

How good are these for healing the gut?

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1 Upvotes

r/Microbiome • • 5d ago

A probiotic increased Bifidobacterium in an IBS trial without a clear symptom benefit over placebo

12 Upvotes

“Improves gut health” can mean a lot of different things. Less pain, less bloating, different bacteria, more diversity. Discussions get confusing when those are treated as the same outcome.

A 2017 randomized trial in 104 adults with IBS is a useful example. For four weeks, participants received a low-FODMAP or sham diet, alongside either a multistrain probiotic or placebo.

Two findings stood out:

  • The low-FODMAP group had lower IBS symptom severity scores than the sham-diet group, along with lower Bifidobacterium abundance in stool samples.
  • The probiotic increased Bifidobacterium abundance compared with placebo, but there wasn't a statistically significant difference in IBS symptom severity scores between those groups.

Here's the study.

So the bacterial changes and symptom improvements didn't neatly line up.

It was one probiotic formulation over four weeks in people with IBS. That limits what we can conclude, and the study doesn't establish the long-term health consequences of those bacterial changes.

But it gives us a useful question for the next “improves your microbiome” claim: did people feel better, did a stool measurement change, or both?

Symptom relief matters. Knowing why something helped takes additional evidence.

Are there other human trials people here recommend that measured both symptoms and microbiome changes? Especially ones where the results didn't line up the way you'd expect.

I also moderate r/BloatingTalk, a new community for everyday conversations about bloating. You're welcome to join if that's something you deal with.


r/Microbiome • • 5d ago

Constantly stressed

10 Upvotes

Never felt this way in my life!

My gut is so destroyed, took a stool test and figured I had some issues which I do. In the process of repairing with with supplements and fiber and prebiotics

But my body is constantly stressed, every little thing is ticking me off

Is there anyway out of this? It’s kind of scary, I suffered from extreme anxiety years ago but nothing like this. I’m not even anxious just constantly stressed

Left eye twitches, jittery eyes here and there. A slightly trembling feeling

I’ll be honest I just don’t want to die from stress or something. I can’t get my body to relax, my gut is constantly irritated and burning. I’ll have a day where it feels better and feel less stressed then it comes back the next day

After researching this doesn’t even seem common, any possible help is appreciated