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Negative-calorie food : ウィキペディア英語版 | Negative-calorie food
A negative net-calorie food is food that requires more food energy to be digested than the food provides. Its thermic effect or specific dynamic action—the caloric "cost" of digesting the food—would be greater than its food energy content. Despite its recurring popularity in dieting guides, there is no scientific evidence supporting the idea that any food is calorically negative. While some chilled beverages are calorically negative, the effect is minimal〔〔 and drinking large amounts of water can be dangerous. ==Foods== Foods that are claimed to be negative in calories are mostly low-calorie fruits and vegetables such as celery, grapefruit, lemon, lime, apple, lettuce, broccoli, and cabbage.〔 These foods are not negative-calorie foods. There is no scientific evidence to show that any of these foods have a negative calorific impact.〔〔 Celery has a thermic effect of around 8%, much less than the 100% or more required for a food to have "negative calories". A stalk of celery provides 6 calories to the body, but the body expends only half of a single calorie digesting it.〔〔 Even proteins, which require the most energy to digest, have a thermic energy of only 20%–30%.〔 Diets based on negative-calorie food do not work as advertised but can lead to weight loss because they satisfy hunger by filling the stomach with food that is not calorically dense.〔 A study on chewing gum reports mastication burns roughly 11 calories per hour.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Negative-calorie food」の詳細全文を読む
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