June 30, 2011 - Opting for reduced-fat crisps could have the opposite effect to that intended: instead they would contribute to weight gain when the diet is already rich in fat, according to a essai1 performed in rats.
Researchers have added Pringles chips, regular or reduced-fat to the diet than thirty rats. The light version of these chips is made with Olestra, a synthetic substitute fat that contains no calories and through the body undigested.
Before you can get some chips in their mouths, the subjects of was first divided into two groups: one receiving a basic diet low in fat, the other a high-fat diet. Then, half of each group received a small amount snack chips, either ordinary or, alternatively, regular potato chips and reduced-fat.
After 28 days, in rats a diet high in fat, the group submitted to the chips 'light' has gained more weight and developed more body fat than potato chips having had only ordinary.
In rats whose staple diet was low fat potato chips do not have a marked effect on weight gain. Nevertheless, the researchers found that those who ate chips eased gained more weight than others when subjected subsequently to a high-fat diet.
The researchers believe that fat substitutes, as are sweeteners may interfere with the body's ability to manage food intake and efficiently use the calories, thus contributing to weight gain.
sweet or fatty foods generally report to the agency a large caloric intake. Their taste triggers various physiological responses needed to manage the calories: hormone secretion, salivation, etc.. However, fat substitutes and sweeteners may confuse this association. The body not receiving the calories "advertised" by the taste never gets used to mobilize resources for its elimination. Also, when real fat or sugars are consumed, they fail to respond adequately.
Conclusion, the researchers said, it is best to choose foods naturally low in fat and calories rather than relying on material substitute fat if you want to lose weight.
2012年7月29日星期日
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