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Effect of gut microbiome modulation on muscle function and cognition

nature.com

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Re: Effect of gut microbiome modulation on muscle function and cognition

#11
> The prebiotic improves cognition (factor score versus placebo (β = −0.482; 95% CI,−0.813, −0.141; p = 0.014))

Always difficult to interpret the effect size of medical studies. Can an expert chime in here? What does this translate to in percentage terms, or number of standard deviations? How can we tell if this is a clinically meaningful delta?

More broadly - why the obsession in medical papers with statistical significance rather than actual, interpretable effect size?

Re: Effect of gut microbiome modulation on muscle function and cognition

#14
post #12

So what should I eat now?

You might enjoy genius foods: https://www.goodreads.com/book/show/35008533-genius-foods

How do I know if this is legit or pseudoscience like alot of supplements or herbal remedy stuff.

Re: Effect of gut microbiome modulation on muscle function and cognition

#15
post #9

the last time I looked at microbiome stuff, someone at Stanford tried to chop up all the microbes in poop and sequence all the RNA/DNA sequences they could collect from that soup. It amounted to several petabytes of data or something ridiculous. Has anyone come up w/ a better way of analysis?

ubiome offered this service before the shutdown. Can't speak to the technical process. Anyone work ubiome in the past?

Re: Effect of gut microbiome modulation on muscle function and cognition

#16
post #9

the last time I looked at microbiome stuff, someone at Stanford tried to chop up all the microbes in poop and sequence all the RNA/DNA sequences they could collect from that soup. It amounted to several petabytes of data or something ridiculous. Has anyone come up w/ a better way of analysis?

That's mind boggling. Is this published anywhere?

Re: Effect of gut microbiome modulation on muscle function and cognition

#17
post #8
post #7

Earlier quoted context omitted.

What about fermented food?

that's a bit broad, as it includes sauerkraut, bread, cheese and beer.

So what I'm taking away from your comment is that I should indulge myself this Oktoberfest for health reasons.

Re: Effect of gut microbiome modulation on muscle function and cognition

#18
It is interesting that they achieved any positive results with prebiotics. The animal study evidence suggests that these are weak interventions compared to fecal microbiota transplant (FMT) from a young individual or flagellin immunization. Weak in the sense that they don't last long for one dose, whereas both FMT and flagellin immunization are essentially years-long to permanent effects, and also weak in the sense of a small effect size on the gut microbiome and health measures compared to FMT and flagellin immunization.

In principle it should be possible to produce some sort of one-time high dose oral probiotic that produces results that are in the same ballpark for effect size and duration as FMT. In practice, it doesn't look like anyone is rushing to get that done, and it might turn out to be very expensive to manufacture 100-200+ distinct microbial populations into a probiotic mix. No-one seems to know whether it would take that many, or whether there are a lynchpin few dozen species one could focus on to get an 80/20 outcome. But that sounds like a question that could be answered in the next decade or two at the present pace.

Re: Effect of gut microbiome modulation on muscle function and cognition

#20
post #9

the last time I looked at microbiome stuff, someone at Stanford tried to chop up all the microbes in poop and sequence all the RNA/DNA sequences they could collect from that soup. It amounted to several petabytes of data or something ridiculous. Has anyone come up w/ a better way of analysis?

The 16S rRNA sequencing you are referring to is now quite cheap and efficient. [1]

Viome is one of many companies offering this as a service. Viome isn't so good at giving you the underlying data, some of the others may be better; look at their example reports or ask their support. Ombre, BIOHM, Tiny Health, Floré, etc.

In terms of whether the add-on services they offer are valuable (tailored prebiotics / probiotics / diet advice based on their reading of the literature) I think only time and randomized controlled trials will tell. Not that any of these services have any incentive to run trials! But it may be a useful time-saver for a self-experimenter who would have been digging through the literature to try to come to the same conclusions on things to test.

[1]: https://doi.org/10.1038/s41467-019-13036-1

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