Scientists are still studying the link between our gut bacteria and our health. We all know the results that one bad burger or a long course of antibiotics can have on our digestive systems, but sometimes the symptoms of a potential problem are much more subtle.

Since about 80% of your immune system is located in your gut, keeping your gut flora “balanced” encourages overall health. Sometimes your digestive system can become too imbalanced, and needs to be reseeded with beneficial bacteria.

It’s easy to blame bad breath on your diet–and it’s true that diet has an impact on your gut flora and therefore your health–but what seems like an innocent odor could be something more. Fishy-smelling breath could mean kidney problems, and a fruity smell can be a symptom of uncontrolled diabetes. Nothing in the body is fully isolated from everything else. This interconnectedness means that our body is always telling us what’s going on with it, but we don’t always know how to understand what it’s saying.