I encourage you to watch this video, Secret Ingredients. It is about the very real but kept hidden pandemic this country has been suffering for the past fifteen years!
The Psychobiotic Revolution: Mood, Food and the New Science of the Gut-Brain Connection
by Scott C. Anderson
Noni juice made on the North Shore of Kauai. Wai Noni is a wonderful probiotic and immune system booster, in addition to being a very strong antioxidant.
Gluten-Free Sourdough Starter by Cultures for Health
For those interested in making their own probiotics!