2、There Are No Negative-Calorie Foods 没有所谓的负热量食品
You may have heard that some foods, because they are difficult to digest, will make you lose weight. Dubbed "negative-calorie foods," citrus fruits and celery have both basked in this flattering light in fad diets over the years. The problem is that it's not true. The calories your body burns in fueling the digestive cycle are minuscule compared with the calories in the food itself. Although chewing celery might seem like a strenuous activity, it burns about the same amount of calories as watching grass grow.
你或许听说过一些食物可以帮助减肥，但那是因为它们不易消化。柑橘类水果和芹菜被冠以“负热量食物”的绰号，近年来在减肥时尚中享有美誉。问题是负热量食物根本不错在。你消化食物消耗的热量与食物本身提供的热量相比太小了。尽管咀嚼芹菜貌似一项激烈的活动，它消耗的热量只如同你看着草生长消耗的热量。