Your doctor may recommend a very low calorie diet if you need to lose weight quickly before a medical procedure or if you have serious health problems because of obesity.

如果你需要在医疗手术之前快速降低重量，或是你的肥胖导致严重的健康问题，你的医生也许会推荐低卡路里饮食。

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In a small study, 20 severely obese patients who were put on a very low-calorie diet lost an average of 20 percent of their body weight.

据医学期刊《肥胖》报告，在一项小型研究中，20名严重肥胖病人被限定摄取很低热量的饮食后，体重平均下降20%。

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A. It's the low fat, very high carbohydrate diet that we've been eating for the last 40 years, which raises levels of the hormone insulin and programs fat cells to go into calorie storage overdrive.

答：是近40年来我们的低脂肪但碳水化合物非常高的饮食，它会提高胰岛素的水平，促使脂肪细胞过度储存热量。

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After six months, the non-diet group had lost an average of 1% of their weight, the calorie restriction group, 10.4%, those who were on a calorie restricted diet plus exercise, 10% and the very low-calorie diet, 13.9%.

BBC: NEWS | Health | Low-cal diet 'long-life benefits'

"I would never recommend doing a very low-calorie diet alone, " says Hernried.

CNN: Extreme diets: Life on 800 calories a day

The drug, which is based on a chemical found in red wine that is thought to mimic the life-prolonging effects of a very low-calorie diet, proved safe.

ECONOMIST: Business this week