Eating For A Healthy Microbiome?

I eat fermented foods because they are purported to improve the microbiota/microbiome in my GI tract. However, is there a way to tell if the microbiome is the "healthy" kind and providing benefits? How can I increase the beneficial microbiota?

Source: Dr. Weil Q and A - February 10, 2015 Category: Consumer Health News Source Type: news