Opting for a diet fizzy drink may seem like the healthier option, but artificial sweeteners used in the beverages may actually be making you gain weight.
New research has linked certain artificial sweeteners with long-term weight gain and increased risk of obesity, diabetes, high blood pressure and heart disease.
Artificial sweeteners, such as aspartame, sucralose and stevia, are used to make many of the most popular soft drinks and according to researchers, consumption of them is widespread and increasing.
Emerging data indicate that artificial, or nonnutritive, sweeteners may have negative effects on metabolism, gut bacteria and appetite, although the evidence is conflicting, they added.
To better understand whether consuming artificial sweeteners is associated with negative long-term effects on weight and heart disease, researchers from the University of Manitoba’s George & Fay Yee Centre for Healthcare Innovation conducted a review of 37 studies that followed over 400 000 people for an average of 10 years.
The trials did not show a consistent effect of artificial sweeteners on weight loss.
In fact, the longer observational studies showed a link between consumption of artificial sweeteners and relatively higher risks of weight gain and obesity, high blood pressure, diabetes, heart disease and other health issues.
“Despite the fact that millions of individuals routinely consume artificial sweeteners, relatively few patients have been included in clinical trials of these products,” said author Dr Ryan Zarychanski, assistant professor at the University of Manitoba.
“We found that data from clinical trials do not clearly support the intended benefits of artificial sweeteners for weight management.”
Lead author and assistant professor Dr Meghan Azad, added: “Caution is warranted until the long-term health effects of artificial sweeteners are fully characterised.”
Dr Azad’s team at the Children’s Hospital Research Institute of Manitoba is undertaking a new study to understand how artificial sweetener consumption by pregnant women may influence weight gain, metabolism and gut bacteria in their infants.
“Given the widespread and increasing use of artificial sweeteners and the current epidemic of obesity and related diseases, more research is needed to determine the long-term risks and benefits of these products,” she said.
The latest study published in the journal CMAJ (Canadian Medical Association Journal).
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