In Focus:

A new yo-yo dieting danger: It can harm your heart, too

For overweight people with heart disease, trying and failing to lose weight may be more dangerous than not losing weight at all.

A new retrospective study has concluded that patients whose weight fluctuates the most die twice as quickly or have twice the risk of heart attack or stroke compared to people who maintain a stable body weight.

And their risk of developing diabetes grows by 78 percent.

The findings, which need to be confirmed by further research, suggest a life-and-death conundrum. Being overweight is already known to pose serious health risks. The new research says dropping the pounds and putting them back on again poses additional dangers.

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