"In this review, we will focus on dietary fibers, which interact directly with gut microbes and lead to the production of key metabolites such as short-chain fatty acids, and discuss how dietary fiber impacts gut microbial ecology, host physiology, and health."
Does this study address the role of insoluble fiber in microbiome health?
My experiences were a month of 3 day water fasts followed by a meal (whole foods like plants and steak), and since then (this was 2 years ago) I do a 3 day fast every 1-2 months or so.
I also was able to stop craving sugars (sodas/ candy, etc) after that first long fast.
I have nothing conclusive, but I suspect that the changes in my mental health and dietary cravings have to do with killing off chunks of my microbiome in the first long fast. Could just be either placebo or other life changes (I turned 40, my wife had left me a month before, and I gave up drinking for 6 months during and after the fast).
So your milage may vary, but if your question is sincere, it might be easier to modify a biome by trimming it back rather than adding to it.
I'd be super stoked to have contradictory / corroborating evidence, though.
The changes to my general modes of dealing with stuff were pretty dramatic. I don't think that my wife leaving made it easier to not eat sweets, but who knows?
I was still pretty upset, I just wasn't suicidally depressed, which was a fair improvement. And as I have continued with the fasting through the months, I have felt better around those times when I'm fasting.
I do 16:8 intermittent fasting and my energy levels are a lot better. Basically I just eat my last meal around 19:00 and skip breakfast. Lunch around 11:00.
I may have a sugar free energy drink in the morning to pick me up (my poor stomach doesn't approve coffee any more, too much of it in my younger days... =) )
But in general many different kinds of plant based foods to promote biodiversity. According to ( https://youtu.be/-LUuqxQSaFQ )
That sounds like I'm making it up, but unfortunately I'm not.
Digestion issues didn't go away completely, but everything is noticeably better now.
Here is what I believe to be a source of many such claims, a 2014 study suggesting that artificial sweeteners can alter gut flora in mice to lead them to being glucose intolerant: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4615743/
I'd be interested if there's anything more recent or conclusive about this - plenty of sensationalistic articles seem to be out there either extrapolating from or challenging this study, but I'm not able to deduce anything further.
And that's it; we don't know anything more detailed than that.
Here's a random study about vaginal microbiota:
There's also a probiotic called visbiome (formerly* known as vsl #3, which is the name the research literature uses) that has shown a lot of effectiveness for IBS and similar issues. I don't feel like digging up the studies for that unfortunately but there's quite a bit of evidence.
* vsl #3 is still marketed but is supposedly a different manufacturing process now. thus visbiome is now the "real" one
But intuitively eating unprocessed foods that are not made with artificial or chemical anything (including artificial sweeteners) is probably a good start.
Fasting is probably another good way to reset your gut.
Edit: poor wording above. I meant to ask whether the artificial sweeteners could take the place of nutrition for the gut bacteria but not actually provide enough nutrition.
Coke Zero doesn't do that, but I still try to stay away from diet sodas.
As a clueless person, I'd think the quantity and stomach acids would make it a negligible risk but worth studying.