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No Evidence No-Cal Sweeteners Will Help You Lose Weight: Study

By Steven Reinberg

WEDNESDAY, Jan. 2, 2019 (HealthDay News) -- If you think a switch from sugar to a calorie-free sweetener might help you get healthier and shed pounds, think again.

After years of research, there's still only very weak evidence that no-cal sweeteners might be beneficial, according to German researchers who looked over data from 56 studies involving either adults or kids.

The investigators looked at a variety of health outcomes including weight, blood sugar, oral health, cancer, heart disease, kidney disease, mood and behavior.

"Most health outcomes did not seem to have differences between the non-sugar sweetener exposed and unexposed groups," concluded the team led by Joerg Meerpohl of the University of Freiburg.

The quantity of non-sugar sweetener used didn't seem to matter, either, the team added.

In children, no evidence was found in weight gain between those who used non-sugar sweeteners or sugar, the research showed.

There was also no evidence of any effect of non-sugar sweeteners on overweight or obese adults or children who were actively trying to lose weight.

In the few studies that did show a mild health benefit for no-cal sweetener use, population sizes were either very small or the duration of the trial was too short to make any firm conclusions, the study authors noted.

One nutritionist in the United States wasn't surprised by the findings.

"No matter how they are marketed, [non-sugar sweeteners] are still chemicals or a sugar modified from its natural form to serve a functional purpose for flavor," said registered dietitian Sharon Zarabi.

"There is no health benefit to flavor. Flavor merely enhances a food or beverage to increase consumption," said Zarabi, who directs the bariatric program at Lenox Hill Hospital in New York City.

A group representing sugar-free sweetener makers disputed the findings, however.

"Despite the authors' claims to the contrary, the highest quality scientific evidence shows that the consumption of low- and no-calorie sweeteners results in reductions in body weight, does not lead to weight gain and does not cause cravings," the Calorie Control Council said in a statement.

The Council pointed to two prior large reviews -- published in the International Journal of Obesity and the American Journal of Clinical Nutrition -- that they say came to the opposite conclusion of the new German analysis.

Meerpohl's team also did not rule out that non-sugar sweeteners might still show some benefit in future trials. They believe better, longer studies are needed to determine once and for all that these products are a safe and effective alternative to sugar.

Zarabi said she's seen no help from calorie-free sweeteners in her practice, however, and even potential harm.

"I work with a wide variety of patients with health ailments. I have those suffering with anorexia drinking Diet Coke all day unable to gain a pound, and obese diabetics drinking the same beverage with out-of-control blood sugar levels and difficulty losing weight," she said.

"It's not specifically the diet soda (made with alternative sweeteners) that's responsible for their health outcomes, more so it's the other sources of calories and sugar," Zarabi said. "You must look at the whole diet and lifestyle to conclude any sufficient evidence of sugars, nutritive or not, and effect on disease."

The report was funded by the World Health Organization and was published online Jan. 2 in the BMJ.

More information

For more on artificial sweeteners, visit Harvard Medical School.

SOURCES: Calorie Control Council, statement, Jan. 2, 2019; Sharon Zarabi, R.D., director, bariatric program, Lenox Hill Hospital, New York City; Jan. 2, 2019, BMJ, online

Copyright © 2019 HealthDay. All rights reserved. URL:http://consumer.healthday.com/Article.asp?AID=741082

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