Though not fully researched and proven, your metabolic rates could be being altered by diet foods, including the low-calorie sweetener saccharin, which increases the chance of weight gain.
2
现在，你可以靠低热量的食物来减肥。
Now, you can lose weight on any diet that cuts calories.
3
然而，在成功减肥后，就算一直摄入低热量食物，我们也很少看到能够持续几年而不反弹的例子。
However, evidence that meaningful weight loss is sustained for more than a few years following a low-calorie diet is hard to find.
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