Naturally, energy is signaled by sweetness; the calories are more when there is a greater sweetness. Scientists say diet foods and artificial sweeteners may trigger weight gain and increase the risk of diabetes, as their sweet taste fools the body's metabolism into believing that we are consuming more calories.
When a drink is too sweet for the calories it contains, the brain becomes confused, Expressdigest.com reported.
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In nature, very sweet foods signal high calorie content to the body which readies itself in response to the food intake. This can cause slowing down of metabolism where there is a mismatch of sweetness and calories.
"They may be free of calories but not of consequences and diabetes is only one of them".
"The statement that a calorie is not a calorie is gobbledegook", said Tom Sanders, Professor emeritus of Nutrition and Dietetics, at King's College London.
Small and her colleagues said the study may help explain the link between some artificial sweeteners and diabetes discovered in previous research.
However, when a "mismatch" occurs, the calories fail to trigger the body's metabolism, and the reward circuits in the brain fail to recognize that calories have been consumed. "Calories are only half of the equation; sweet taste perception is the other half", Small said in a university news release. Reward circuits in the brain also did not register that calories had been consumed, which could lead to eating more.
But diet products that do not taste sweet confuse the brain into thinking there are fewer calories to burn than there are.
Many processed foods contain similar mismatches, including yoghurts with low-calorie sweeteners.
According to Dana Small, Human bodies are emerged to use the natural sources of energy, but the modern foods in today's world consist of energy sources which are not seen by the body.
The U.S. National Library of Medicine has more on artificial sweeteners.