This tiny digestive tracker can tell what food gives you gas
 

One of my favorite things to eat is cheese and egg on a bagel. But while it's delicious, let's just say that afterward we don't get along so well. Is it the egg? The cheese? I could go to the doctor and find out which and why, but the testing process...

https://www.engadget.com/2016/12/08/...stive-tracker/