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Lack of Sleep Risks Weight Gain

When you don’t get enough sleep your blood level of leptin— a hormone that suppresses your appetite—drops. When the level drops, your appetite will increase for high-calorie, high-carbohydrate foods.  To help keep your leptin level up and reduce your urge to overeat, get six to eight hours of sleep a night.

Source:  The Journal of Clinical Endocrinology and Metabolism, November 2004.