Before you start with questions, I'm not saying that, But now that you said it, it's possible the immune system may play a big part in it.(By the way that was a good way of analyzing this) I don't know about the yeast part though, because if you say that people will just focus on that. I'm just saying what I used to help myself. I purchased the Primadophilus after reading a comment written by a young man who went to the doctor with his friends and because it had more and strains than the other probiotic I had been using.(I forget to take it everyday because I keep it in the back of the refrigerator) and I know Primadolphilus with Bifidus works on the digestive system. I thought I had listed it as one of the things I was taking earlier last month in the forum, I know I have mentioned Primadophilus with Bifidus in this forum in the past.
A couple of months ago I put a comment in this forum about a young man who had mentioned that he and some friends went to a doctor with some more friends who didn't have a BB or a fecal BO problem. The doctor took test on all of them and found that him and his friend who had fecal odors were missing something in their digestive system that needed to be replaced in their intestines. He ended up using 3 probiotics and that helped his fecal odor and his underarm problem he was having as well, Everyone is different. And the some of the strains are listed in the article I have enclosed at the end of this comment, that was why I purchase the Primadophilus with Bifidus. I'm not a doctor and I don't have all the answers, before you know it people will be saying I'm diagnosing them and I am not. Some people may have a magnesium deficiency, some may need a little extra boost like I do to bring a balance to my digestive flora, and others have had their Fecal BO eliminated by taking B5. What seemed to work for me was Goldenseal and Probiotics, Digestive enzymes, Magnesium and Calcium and B-Complex which has all the B's, Everyone is different.
And from listening to others who have gotten better it seems like the problems are in the digestive area or with not enough acid in the stomach. I learned after reading something from Mia Mom that some could have a hydrochloric imbalance. These are all things that people can look into for themselves and see if this may be their problem People are getting healed in certain ways. By sticking to certain regimes that seem to work for them and doing their research. You have to find something that works for you and stick with it (once you've done your research for your symptoms) for a while and see if it works, if it does keep it up. But from what I'm noticing is that the problems seem to lie in the gut flora and maybe the liver needs some detoxing, taking B5, eliminating sugar.ect... Some people may need one probiotic,I needed 2. http://www.ehow.com/about_5047305_primadophilus-bifidus.html