I'm far from convinced that Kombucha has any significant health benefits, or at least any that can't be gained by drinking ordinary black or green tea. It's a fashionable fad.
It is probably unwise to interfere with one's normal gut flora, as evidence is beginning to emerge that some changes in the germs normally present in the gut are not good for us, and may be associated with some significant problems.
So-called Probiotic capsules, available at good pharmacies may be valuable, especially when one has taken antibiotics or anti-fungal meds which can damage the normal organisms living in one's gut.
I don't see how a sauna or garlic would be of any use in dealing with a fungal gut infection. The same go for keto supplements or whatever "high colonic water" might be. Remember that most "supplements" on sale are highly profitable to those who sell it, but there's very little evidence that they are of benefit, an thy take advantage of our foolish laws that exempt anything that calls itself a "supplement" from the requirement that drugs have, for providing piles of evidence that they are safe and useful.
Remember that if you are in the habit of trying various fads and supplements, there's a good chance that some day, when for totally other reasons you happen to feel particularly good that day, you may assume, sincerely but wrongly, that the feeling good was caused by that day's supplement.
It'd be better for you to see a good specialist psychiatrist to assess you fully, as regards your depression and anxiety, and to tell them of your various other attempts to improve this, and then seriously discuss your real treatment options
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