Most people choose artificially-sweetened soda over regular soda to avoid packing on extra pounds. But what if you already choose diet? Would it be helpful to quit that too?

Dr. Jim Hill says he gets this question all the time from patients in his weight loss program at the University of Colorado’s Anschutz Health and Wellness Center.

With funding from the American Beverage Association, Hill helped design a study that divided approximately 300 adults into two groups: One group would continue drinking diet, and the other group — referred to in the study as the “water group” — would go cold turkey. The study was published in the journal Obesity.