IE 11 is not supported. For an optimal experience visit our site on another browser.

What does sugar do to your brain?

05:30

TODAY’s “Summer of Secrets” series continues with a detailed look at the science of sweetness, as scientists tell NBC correspondent Kate Snow just why we like sugar so much, even though excessive amounts of it are bad for us. Snow also cautions viewers to look out for “hidden sugars” in such unexpected products as spaghetti sauce.