The number of bacteria that reside in our gut is over 100 million, however not all of them are created equal. While some are good for us, others are harmful. An excess of harmful bacteria in the gut has been linked to numerous health issues, ranging from skin conditions, digestive problems and even mental health issues. In the informative video you're about to see, you'll learn 7 key symptoms that you should be aware of, which could potentially indicated an unhealthy gut. Take a look: