Many people who have constant digestive and/or elimination problems tend to be overweight due to difficulties digesting food, assimilating nutrients, and eliminating waste. Digestion is a key element in overall wellness. Digestion is not just about what you eat or the issues you might have, like bloating or occasional heartburn, but may also have an immune system connection. In fact, more than 70 percent of the immune system is in the digestive tract! A healthy gut supports health in many other areas of the body.