No one would ever consider a disease a good thing, but some diseases have beneficial side effects. For instance, people who have celiac disease are usually in excellent shape. This isn’t because the disease helps your body process fat better or anything like that, rather, anyone who has celiac disease cannot eat anything with gluten in it. That adds up to just about everything unhealthy. For instance, people with celiac disease usually eat a lot more fruits and vegetables, a lot more fish, and a lot less fast food. No one should ever wish to have celiac disease, but sometimes illnesses have some upside.
