When we make food choices, we are eating for trillions….of bacteria, fungi archaea and yeast that live symbiotically within us. The macro and micronutrients in the foods we eat impact our microbiome in ways we are only just beginning to understand. And, it turns out that the microbiome can affect just about every system in the body including the brain, body weight, and even our lactate metabolism! The microbiome has some interesting preferences for fuel and depending on what you eat (or avoid), your inner colonies may be starving. If diet weren’t enough, our microbes also respond to the exercise and physical activity we engage in daily. Come learn what we know about the microbiome, and how food and exercise can keep your trillion partners (and you!) happy and healthy.