Jonah Lehrer summarizes a few studies:
The essential lesson is that the brain doesn't like being tricked. When you give us sweetness without the caloric energy, we end up craving calories more than ever.
It tastes awful too, with the sole exception, in my humble opinion, of Coke Zero.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2009/02/does-diet-soda-make-you-fat/205695/
