When I tell people that people who have diabetes are more likely to develop depression than people without diabetes, they may look at me funny, but they usually accept it. The fact that this pathway works in both directions is what baffles people.
That's right. Not only does having diabetes increase your risk for depression, but also having depression increases your risk for developing diabetes.
It makes sense if you think about it on a surface level. For example, people who are depressed may gain weight or not feel like exercising or eating healthfully, which can lead to developing diabetes. What's even more amazing, though, is that studies have shown that, even after controlling for behaviors like eating right and exercising, having depression still means you are at risk for diabetes.