"You aren’t you, the single entity. You are you and the billions of bacteria, yeasts, and other microbial organisms that live in your body and outnumber your own cells. So when you’re eating, you’re not just feed- ing and providing energy and micronutrients for your own tissues, organs, muscles, and cells. You’re also feeding the microbes living in your gut. And these aren’t passive passengers. They are active participants in your digestion, your immune response, your thinking, and even your emotional processing. To ignore the health of your gut is to gamble with your health and happiness. To eat the wrong foods and fail to eat the right ones won’t just ruin your health. It jeopardizes the health of your gut and its resident bacteria—which in turn jeopardizesyour own health."