I came across this site today and thought it was timely, given recent discussions on probiotics, yeast and gut health
http://heal-thyself.ning.com/profiles/blogs/overwhelmed-where-to-start
There are tons of blogs here on diet, treating candida, making your own probiotics, how to interpret gut health from studying stools...lots of good stuff. The one thing I caution is that some of these posts are a few years old - long before 23andMe could tell anyone whether certain things were "good" or "bad" for them. One post raves about epsom salt baths and how they are a "must" for everyone. But if you have a CBS mutation, it's actually more of a "must avoid" as my DD can tell you, after emerging from baths I insisted would be helpful, her skin red and itchy from an OD of sulfur (oh, their therapists will have so much to talk about when they're grown).
But in general, I found this to be a pretty realistic place - with more than one blogger acknowledging that not everything listed as a recommendation would be practical for every person. Worth checking out.