It has to do with the body craving a biological reward, says Tufts public health professor
The Tufts Now video series Ever Wonder features faculty and other experts answering questions about which we all might have wondered—everything from why we have cravings to how pollution affects us.
You can view the entire series at http://everwonder.tufts.edu, and submit your own questions there, too.
Steffan Hacker can be reached at steffan.hacker@tufts.edu.
