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grubalo

What are some beneficial gut bacterial species?

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Posted (edited)

Hi,

Can anyone mention some key *human* gut (large intestine) bacterial species that are considered beneficial, confirmed by peer-reviewed research? There is a lot of literature establishing links between diseases and higher or lower diversity or with particular species of gut bacteria, plus there is a lot of variation from person to person in terms of microbial composition. But, is there a consensus on some gut bacterial species that are beneficial to the body, and commonly found in anyone?

Thanks!

Freddy

Edited by grubalo

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If you're bovine the answer is a little more straightfoward. 

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Posted (edited)

https://www.google.com/search?q=gut+bacteria+vitamins

"Probiotic bacteria, members of the gut microbiota, are able to synthesize vitamin K and most of the water‐soluble B vitamins, such as biotin, cobalamin, folates, nicotinic acid, panthotenic acid, pyridoxine, riboflavin, and thiamine, in humans."

https://en.wikipedia.org/wiki/Probiotic

 

Edited by Sensei

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Thanks for your comment, dimreepr... it led me to this article

 

Colonization of the human gut by bovine bacteria present in Parmesan cheese

https://www.nature.com/articles/s41467-019-09303-w

 

didnt know about that!

2 minutes ago, Sensei said:

https://www.google.com/search?q=gut+bacteria+vitamins

"Probiotic bacteria, members of the gut microbiota, are able to synthesize vitamin K and most of the water‐soluble B vitamins, such as biotin, cobalamin, folates, nicotinic acid, panthotenic acid, pyridoxine, riboflavin, and thiamine, in humans."

https://en.wikipedia.org/wiki/Probiotic

 

That's true, that's one good example, but a bit broad, need to check if we know what species are actually responsible.... Looking for any other good examples like this... Thanks, Sensei

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Posted (edited)
4 minutes ago, grubalo said:

yes... but its Wikipedia...which I love, but Im after peer reviewed sources...

Once you have the specie name (from Wikipedia article, like I said), you can search net for keyword and get peer-reviewed articles..

 

Edited by Sensei

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25 minutes ago, Sensei said:

Once you have the specie name (from Wikipedia article, like I said), you can search net for keyword and get peer-reviewed articles..

It's not that simple, we eat more than just grass...

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2 hours ago, grubalo said:

yes... but its Wikipedia...which I love, but Im after peer reviewed sources...

 

 

Check the references in Wiki. That's how you know the sources.

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3 hours ago, Strange said:

yeah... but these are not always peer reviewed sources. Like with the gut bacteria list, it was sources from this "textbook"

http://www.textbookofbacteriology.net/normalflora_3.html

but the textbook it self doesnt provide clear references to the sources. If you look, Bacteroides fragilis, one of the species listed, this species is rather a pathobiont, rather than a benefical bacteria. Anyway, subtle difference, but I was hoping to hear from anyone who knew of a study showing a list of strictly beneficial, comensal, bacteria. Anyway, I just wanted to see what species people came up with...

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This question is actually quite tricky when it comes to humans. The reason being that it is difficult to associated specific bacteria (or even communities) with overall better outcomes. There are often so many confounding factors that makes it difficult to pinpoint benefits of particular bacteria.

In addition, it is possible that much of the benefits is based on community actions, which might further be influenced by interactions with the host and diet. To the best of my knowledge we basically have a set of bacteria that we know to be common gut bacteria with little pathogenic potential and there is the assumption that that they at least confer passive benefits (e.g. inhibiting pathogenic bacteria). There  are some suggestions based on a specific conditions (e.g. looking at the gut community of folks with certain health issues or by extrapolating known metabolic activities that could be beneficial). However, so far we do not actually have a good grip in understanding what gut flora is actually really healthy and how to get it. 

The effects of pre- and probiotics are not very reproducible, for example.

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7 hours ago, CharonY said:

This question is actually quite tricky when it comes to humans. The reason being that it is difficult to associated specific bacteria (or even communities) with overall better outcomes. There are often so many confounding factors that makes it difficult to pinpoint benefits of particular bacteria.

In addition, it is possible that much of the benefits is based on community actions, which might further be influenced by interactions with the host and diet. To the best of my knowledge we basically have a set of bacteria that we know to be common gut bacteria with little pathogenic potential and there is the assumption that that they at least confer passive benefits (e.g. inhibiting pathogenic bacteria). There  are some suggestions based on a specific conditions (e.g. looking at the gut community of folks with certain health issues or by extrapolating known metabolic activities that could be beneficial). However, so far we do not actually have a good grip in understanding what gut flora is actually really healthy and how to get it. 

The effects of pre- and probiotics are not very reproducible, for example.

Yes, that was my thinking. I found one table, in this guide by a testing company

 

https://www.diagnosticsolutionslab.com/sites/default/files/u16/GI-MAP-Interpretive-Guide.pdf

page 19.

 

It lists some commensal/normal bacteria. But, searching for some of these, for example, if you look at Bacteroides fragilis, in this table listed as a commensal bacteria with important role, it is also associated with disease, depending on the context

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2176045/

 

So I guess its up to the bacteria been in the right level... overgrowth /dysbiosis would make any bacteria problematic... although I dont know if this is backed by research

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2 hours ago, grubalo said:

Yes, that was my thinking. I found one table, in this guide by a testing company

 

https://www.diagnosticsolutionslab.com/sites/default/files/u16/GI-MAP-Interpretive-Guide.pdf

page 19.

 

It lists some commensal/normal bacteria. But, searching for some of these, for example, if you look at Bacteroides fragilis, in this table listed as a commensal bacteria with important role, it is also associated with disease, depending on the context

 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2176045/

 

So I guess its up to the bacteria been in the right level... overgrowth /dysbiosis would make any bacteria problematic... although I dont know if this is backed by research

And location.

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