That's right, the very same drug that America is trying to outlaw without actually doing it directly.
In an article in the journal Science, Yale University researchers describe experiments on mice which found nicotine activates neurons to send signals the body has had enough to eat.
However they are not the same neurons which trigger a craving for tobacco.
As a result, the researchers say nicotine-based treatments could help control obesity.
A research team from Yale University School of Medicine and Baylor College of Medicine in Houston performed a combination of molecular, pharmacological, behavioural and genetic experiments on mice.
They found that nicotine influences a collection of central nervous system circuits, known as the body's hypothalamic melanocortin system, by activating certain receptors.
These receptors, in turn, increase the activity of pro-opiomelanocortin (POMC) neurons, known for their effects on obesity in humans and animals.
This story is starting to go the way of the alcohol story, where first the American puritans yack about how it is pure evil and try to browbeat others into not using it, then science comes along as says not so fast, this stuff can be good for us. Pesky Science!
EDIT: And caffeine as well, it was just 5 years ago that I often heard loads cute neurotic women either fretting about their caffeine consumption or gloating about their being able to sacrifice it, back when caffeine was supposed to be so bad for us. Now science has shown that it regulates blood sugar and keep diabetes at bay, they are checking into what else good it does for us. OOPS!