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Ban on Sale of Sugary Drinks Trimmed Employees' Waistlines

HealthDay News
by By Amy Norton
HealthDay Reporter
Updated: Oct 29th 2019

new article illustration

TUESDAY, Oct. 29, 2019 (HealthDay News) -- After the University of California, San Francisco, banned sales of sugary drinks, employees started downing less liquid sugar -- and their waistlines showed it.

In a before-and-after study, researchers found that the ban, begun in 2015, cut employees' intake of sugary drinks by almost 50%. And within 10 months, their collective waist size had shrunk by almost an inch.

The university is one of a growing number of employers that have stopped selling sugar-laden beverages -- in cafeterias and vending machines -- in a bid to promote healthier lifestyles. But whether it's working has been unknown.

The new study, published online Oct. 28 in JAMA Internal Medicine, is the first to gauge the effects.

The results were surprisingly good, said senior researcher Laura Schmidt, a professor at the university's Philip R. Lee Institute for Health Policy Studies.

Among 214 employees who were heavy consumers of sugary drinks before the ban, the average daily intake of those beverages dropped by 48% within 10 months. Specifically, they went from downing 35 ounces per day, on average, to 18 ounces.

"That's pretty big for a simple intervention," Schmidt said.

The reduced consumption was based on what the workers reported, which, Schmidt acknowledged, can be influenced by social pressure.

But the researchers also had biological evidence to back up employees' claims. People who reported bigger reductions in sugary drinks also showed more improvement in their sensitivity to insulin -- a key hormone in regulating blood sugar. Problems with insulin sensitivity can be a precursor to type 2 diabetes.

And then there was the change in belly size. Across the whole study group, average waist circumference dipped by just under an inch.

"The idea that you can tweak this one thing and show that kind of effect is pretty exciting," Schmidt said.

The policy removed all sugar-added drinks from the university's cafeterias, vending machines and food trucks -- allowing only the sale of bottled water, diet drinks, unsweetened tea and 100% fruit juice.

In addition, more water stations were set up across campus, and there was an educational campaign to explain the motivation to employees, Schmidt said. Given that the university is a health sciences campus, she noted, there was a special element to those motives: Isn't it against the campus's mission to be selling sugar?

Education, the study suggested, seems to go a long way.

Of the 214 employees the researchers studied, half were randomly assigned to a "motivational intervention" at the outset. It involved a 15-minute interview with a health educator who talked to them about the health effects of sugar, and how to cut back.

It turned out that those employees were more successful in curbing their sugary drink intake -- slashing it by over 25 ounces a day, on average.

Jennifer Harris is director of marketing initiatives at the University of Connecticut's Rudd Center for Food Policy & Obesity. She said, "I think it's a great policy, and it's great they actually saw benefits. You could argue that employees would just get their sugar-sweetened beverages elsewhere."

But, she said, the policy might have offered workers a "reminder" that the drinks are not healthy choices.

"Sugar-sweetened beverages are the biggest [source] of sugar in people's diets," Harris said.

And cutting them out has no downside, Schmidt pointed out, since they offer no needed nutrients.

Could such a policy work outside of a San Francisco medical campus? The employees in this study were not a bunch of professors and doctors; more often, they were in service or technical areas, including cafeteria workers who formerly had access to all the sugar they could drink.

But, Schmidt said, more research is needed to test sugary drink bans at various workplaces, in different areas of the country.

The researchers are now studying the effects of a sales ban at a group of California hospitals. Health systems in other states -- including the Cleveland Clinic, University of Michigan, Baylor in Texas, and Geisinger in Pennsylvania -- have also instituted sales bans.

More information

The American Heart Association has advice on avoiding added sugars.