Weight loss as a process of detoxification has been a common result of many people doing the Plan, while eating beneficial amounts of calories. I don't promote the Plan for weight loss, as that's just a side-effect of getting healthier. The Plan is not designed as a weight-loss and program and I don't promote it for that. You may want to look at our Facebook group and other places on the web where testimonials are shared by people who have done the Plan.
Antibiotics will wipe out all of the bacteria in the body within a period of about 5 days in many cases. Studies show that it takes about 9-12 months or more for the majority of those species to grow back, with some never returning, thus the possibility of a permanent alteration with antibiotic use. The intestinal flora isn't permanently gone as you imply. Depending on the study, the number of species cited ranges from 400 to 40,000. At this point in the evolution of science, no one can actually state the exact number or amount. Repopulation of the intestinal flora takes place via the foods and fluids that we consume, as well as casual contact. The number of probiotics species and strains that are currently known and used is very small in comparison to what would normally be found in the human intestinal tract. The ones that are used have demonstrated beneficial effects in humans, in studies.
We've seen a lot of seriously ill people over the years have success with the Plan. Some write about it, but most don't. It's a tricky area with so much government oversight. If someone shares something great on Facebook, I can't even hit the "Like" button, as that's considered an endorsement of what someone has written and I'm advertising a cure. One company recently found themselves in hot water with the FDA/FTC for doing so.
People periodically post their results here on Curezone. I don't run around asking for them, however.