"America's Favorite Cookie" doesn't look so threatening on its own.
A single Oreo contains 40 calories, 3.3 grams of sugar and 2 grams of fat.
Doesn't sound bad if you can limit yourself to two or three, right?
But that's the problem—most people can't. In fact, science shows that the high-sugar, high-fat taste of Oreos is flat out addictive.
A 2013 study discovered that Oreos and drugs such as cocaine and morphine have similar effects on the brains of rats.
The study's authors wrote, "Rats formed an equally strong association between the pleasurable effects of eating Oreos and a specific environment as they did between cocaine or morphine and a specific environment. [The researchers] also found that eating cookies activated more neurons in the brain's 'pleasure center' than exposure to drugs of abuse."
That's why that box of Oreos seems to disappear from your pantry so quickly.