Apparently it really is true that sleeping more means weighing less.
sleep loss can alter hormones involved in appetite and metabolism.
In one small study, healthy young men who slept for only 4 hours for two nights in a row showed a dip in the appetite-suppressing hormone leptin, and an increase in the appetite-stimulating hormone ghrelin.
There’s also evidence that sleep loss impairs normal blood sugar metabolism, Knutson said.
Still, the current findings suggest that more attention should go toward how sleep is measured in studies, according to Knutson. For example, she said, asking some people how much time they spend in bed will accurately measure how much sleep they get; but for people with poor sleep quality, much of that time may be spent tossing and turning.