(Reuters) - Take another sip of that Diet Coke without fear that it may be spurring your appetite. Apparently, diet soda drinkers don't eat any more sugary or fatty foods than people who stick with water instead, according to a U.S. study.

Some researchers have proposed that drinks sweetened with artificial sugar might disrupt hormones involved in hunger and satiety cures, causing people to eat more. Others hypothesized that diet beverages could boost the drinker's preference for sweet tastes, translating to more munching on high-calorie treats.

"Our study does not provide evidence to suggest that a short-term consumption of diet beverages, compared with water, increases preferences for sweet foods and beverages," wrote lead researcher Carmen Piernas in the American Journal of Clinical Nutrition.

Piernas, from the University of North Carolina at Chapel Hill Gillings School of Global Public Health, and her colleagues, looked at 318 overweight or obese adults in North Carolina, all of whom said they consumed at least 280 calories' worth of drinks each day.

One third of the participants were advised to substitute at least two daily servings of sugary beverages with water. Another third was instructed to substitute diet drinks, including Diet Coke and Diet Lipton Tea.



After three and six months, people reported their food and beverage intake on two different days in detail. A previous publication showed that participants in both groups lost weight.


Six months in, the only differences were that members of the water group ate more fruit and vegetables, and people randomized to diet beverages ate fewer desserts, compared to their diet habits at the study's onset.

"That's sort of the opposite of what you would expect if consumption of diet soda increased the preference for sweets," Malik told Reuters health.

Some studies have suggested an increased risk of cancer tied to certain artificial sweeteners, but convincing evidence is lacking, Malik said.

In addition, a French study, which appeared in the same journal, found that French women who drank beverages sweetened with either real or fake sugar were more likely to be diagnosed with diabetes over 14 years than those who stuck with water.

Piernas warned that everyone in her study was heavy and trying to lose weight, so the findings may not apply to normal-weight people who drink a lot of diet beverages.

"We're trying to reduce sugar-sweetened beverage intake in the population for obesity, so the next logical question is, what substitutes can be used?" Malik said.

