The Microbiome Diet: The Scientifically Proven Way to Restore Your Gut Health and Achieve Permanent Weight Loss by Raphael Kellman

This diet is expensive and impractical. The author defines the microbiome as the "miniature world made up of trillions of microscopic, nonhuman organisms that flourish within your intestinal tract." Nonhuman? Really? As opposed, I suppose, to the miniature world of trillions of microscopic human organisms flourishing in our intestines?
The author claims that a microbiome imbalance could cause a variety of problems including weight gain, digestive problems, immune system problems, depression, anxiety and foggy concentration.
His diet includes lots of supplements - a hugely expensive amount of supplements - and several recent studies have shown that many supplements don't even include the ingredients that they claim to, nor are there any studies that show that these supplements actually have any effect at all - along with a typical elimination diet at the beginning eliminating all processed foods, dairy, soy, gluten, eggs, HFCS, and other reactive foods. The recipes include a lot of expensive and/or difficult to find ingredients including Jerusalem artichoke (not regular artichokes which are easily found in stores), fennel (I am now growing some in my garden, but it is often quite expensive in stores), arugula (more expensive than regular lettuce), something called Lakanta (never heard of it or seen it in a store), goat or sheep dairy (I like it, but it is more expensive), and gluten free beer (I don't drink beer, but I am sure that is more expensive and hard to find than regular beer) among other things. I do not condone the SAD diet or eating junk food. I think a healthy diet rich in vegetables is important.
However,I think that this particular diet would be both expensive and difficult to follow due to the cost and negligible effect of the supplements and difficulty in finding some of the more exotic ingredients.