Regarding the questions about Enterolab: I hear you - the internet is indeed full of scams, and the shady record of many such labs, in the past, is the main reason why most GI doctors are slow to embrace the technology used by Enterolab, (they've been stung before, and such memories tend to linger forever).
Enterolab was founded by Dr. Kenneth Fine, roughly 10 years ago. Dr. Fine has MC himself, which is the reason why he started researching the disease, in the first place. He is the person who discovered the link between diet and MC, and he is the creator of the "Pepto-Bismol" treatment, (he developed it over 10 years ago, but many GI docs are just now beginning to recognize it as a possible treatment for MC).
Enterolab is a fully accredited lab, and since it is located in Dallas, Texas, you can check his professional reputation online, at the Texas Board of Medical Examiners. The last time I looked, he had zero negative entries on his record. His tests are patented, all over the world, and no other labs are licensed to use his technology, so that's why you don't see anyone else offering stool tests for food intoleraces, that actually work - he holds all the patents.
The downfall of most labs is their poor repeatability record, because individual technicians judge the results differently, so they report different results. Only one individual does all the testing at Enterolab, and he holds a PhD, so their tests are absolutely repeatable, reliable, and accurate. For example, Dr. Fine's stool tests can detect gluten sensitivity several years before the disease becomes severe enough to raise the antibody level in the blood to a level where the classic celiac blood tests can detect the disease. IOW, the stool tests are several orders of magnitude more sensitive than the blood tests.
If you will read some of the celiac discussion boards, you will discover that Enterolab has accumulated thousands upon thousands of satisfied customers over the years that they have been in business. There is no way that they could have done that if they were not totally legitimate. I'm not suggesting that there are absolutely no unhappy customers out there, but I haven't come across a single one, so far, and I've scanned a heck of a lot of internet discussion boards related to this topic.
IMO, they're the only game in town, if you want to test for food sensitivities. There are other labs offering so-called food sensitivity tests, but none of them come close to the standard of accuracy and reliability maintained by Enterolab.
And no, I'm not on their payroll, nor am I affiliated with them in any way, other than the fact that I am a very satisfied customer. Just for the record, I have only ordered 3 food sensitivity tests from them, (egg, yeast, and soy). All three results were negative, and sure enough, I do not react to those foods. At the time that I ordered the tests, though, I wasn't sure, so this saved me a lot of misery and aggravation, since I didn't have to wonder if I was sensitive to them, and I didn't have to worry about keeping them out of my diet.
Yep, Enterolab gets an unequivocal

from me.
Tex