Soft Drinks Up Calorie Counts

or fewer fries -- than a
person who washes the burger down with water.

Some studies suggested that the fattening effects of soft drinks go beyond
mere calorie counts.

"Sometimes, in fact, people who regularly drank soft drinks ate even
more," Schwartz says. "The number of additional calories they took in
was more than the calories in their soft drinks. It is almost as if sodas led
to greater calorie intake because people get calibrated to a certain level of
sweetness."

The Yale team looked at 88 different studies of nutrition and soft drinks.
They then used a statistical technique for comparing the effects of soda
drinking across all of the studies.

Since diets differ widely, it's hard to identify any single dietary factor
that has even a small effect on health. Yet the Yale study shows that soft
drinks have a "moderate" effect on calorie intake.

"If you are going to pick one change to make in your diet, and you drink
sugared soft drinks, that would be a great place start," Schwartz says.

The study appears in the April 2007 issue of the American Journal of
Public Health.

Soft Drinks Just Another Food Choice?

Barry M. Popkin, PhD, director of the obesity program at the University of
North Carolina at Chapel Hill, was not involved in the Yale study. His own
research suggests that soft-drink intake contributes to obesity.

"This was a very well done, careful study," Popkin tells WebMD.
"It highlights ... the effects of sugared beverage intake on
health."

Richard Adamson, PhD, a former NIH researcher, now serves as scientific
consultant to The American Beverage Association, the trade group representing
the U.S. soft-drink industry. His take on the Yale study is far different from
that of Popkin.

Adamson says the Yale researchers did not include important studies that do
not implicate soft drinks in obesity. He therefore wonders whether the authors
cherry-picked studies and study data that support a preconceived
conclusion.

And he says the study certainly does not prove that calories from soft
drinks are more dangerous than calories from other foods.

"The idea that drinking liquid calories is different than eating solid
calories is debatable," Adamson tells WebMD. "There are studies that
show it is calorie intake that is important. It has nothing to do with whether
foods are in a liquid or solid form."

If she seems to be picking on the soft-drink industry, Schwartz says, it's
"because we really feel the science is there."

She notes that U.S. soft drink consumption has grown along with the U.S.
obesity epidemic. In 1970, Americans drank 22 gallons of nondiet soft drinks
per person. By 1997, that nearly doubled to 41 gallons per person -- and
obesity went up 112%.

Tracey Halliday, a spokesperson for the American Beverage Association, says
there's nothing wrong with choosing a soft drink for refreshment -- if it's
part of an otherwise healthy lifestyle.

"It comes down to balancing calories consumed vs. calories burned,"
Halliday tells WebMD. "The beverage industry provides a range of choices,
from bottled waters to sugared beverages, and all of them can be part of a
healthy lifestyle. Adults can make healthy choices, and sugared beverages can
be part of that."

Schwartz insists that sugared soft drinks aren't just another beverage.

"The message that soft drinks are not healthy beverages has been
obscured by the industry rhetoric that any food can fit into a healthy
diet," she says. "Our paper shows that all beverages are not
equal."

By
Reviewed by Louise Chang
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