Diet is a very important factor in health—what we eat, how much we eat, and when we eat. Current methods to track people's diets are fairly unreliable. The food diary is the most commonly used practice but prone to errors and omissions.
A new invention from scientists at the Tufts University School of Engineering might be the solution to this problem. They have designed a tiny, wireless sensor that can attach to a tooth. It's just 2 millimeters square, can flexibly conform and bond to the surface of a tooth and collect information about a person's consumption of salt, glucose, and alcohol as it enters the mouth and can report in real time.