There are now over 450 million people globally suffering from some form of mental illness. Most are treated with pharmaceutical drugs and therapy. But drugs and therapy aren't the only answer. Food can be your first line of defense against mental illness. There is compelling evidence that healthy gut bacteria plays a crucial role in anxiety and depression. Learn the right foods to eat and the foods to avoid for a healthy gut and brain. We also explore ways to get B12 on a plant-based diet.