No reason to replace fructose with glucose, study
There is no benefit in replacing fructose, the sugar most commonly blamed for obesity, with glucose in commercially prepared foods, according to researchers at St Michael’s Hospital in Toronto.
The findings, published in the February 2014 edition of Current Opinion in Lipidology, showed that when portion sizes and calories were the same, fructose did not cause any more harm than glucose.
“Despite concerns about fructose’s link to obesity, there is no justification to replace fructose with glucose because there is no evidence of net harm,” said Dr John Sievenpiper, a researcher in the Clinical Nutrition and Risk Factor Modification Centre of St Michael’s Hospital.
Using data from previous research trials, Dr Sievenpiper and his team compared the effects of fructose and glucose against several health risk factors. The study found that consuming fructose may increase total cholesterol and postprandial triglycerides, a type of fat found in blood. However, fructose did not appear to affect insulin production, other fat levels in the bloodstream or markers of fatty liver disease anymore than glucose did.
In fact, researchers said fructose showed potential benefits over glucose in some key risk factor categories.
“Some health care analysts have thought fructose to be the cause of obesity because it’s metabolised differently than glucose,” Dr Sievenpiper said. “In calorie-matched conditions, we found that fructose may actually be better at promoting healthy body weight, blood pressure and glycemic control than glucose,” he said.
Fructose, a simple sugar found in honey, fruit, vegetables and other plants, is also the basis of high-fructose corn syrup — a sweetener often found in commercially prepared foods. The combination of both fructose and glucose produces sucrose, generally known as table sugar.
Dr Sievenpiper said he feels that overconsumption, rather than a particular type of sugar, is one of the leading causes of obesity.
“Overall, it’s not about swapping fructose with glucose,” Dr Sievenpiper said. “Overeating, portion size and calories are what we should be refocusing on — they’re our biggest problems,” he said.
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