High-protein diet is proven to provide better sleeping experience. The latest study conducted by the Purdue University revealed that middle-aged adults with obesity and overweight problems, who have tried to lose weight by taking a diet with high protein, can possibly sleep better at night.

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According to Dr. Wayne Campbell of nutrition science, the majority of researches looks at the effects of sleep on the control of weight and diet, especially the protein's amount, on sleep. He also added that the quality of sleep is significantly changed to the middle-aged adults who use lower intake of calories and a high-protein diet, than those who lost the similar amount of weight yet used a regular protein diet.

The first study discovered that the 14 subjects who used a high-protein diet had a better sleep during the weigh-loss period of four weeks, Neurology reported. On its main study, which involved 44 obese and overweight subjects, they gave high-protein and normal-protein weight loss diet during a 16-week period.

The subjects were told to use 1.5 or 0.8 kilograms of protein for each kilogram of body weight. Each month, they are told to rate their sleep's quality. The results showed that those who consumed high-protein weight loss diet, which composed of legumes, mild protein, pork, soy and beef, had a significant improvement in sleep.

The first author of the study Jing Zhou said that it is important to be aware of the effect of the changes in lifestyle and diet to the improvement of sleep, considering the high incidence of sleep disorders.

High-protein diet was also studied in the Campbell's laboratory, focusing the effects of its quantity, including the patterns and sources of appetite, body compositions and weight, Reuters reported. Campbell also added that the study was the first to look into the questions on how the dietary pattern can affect the quality of sleep.

High-protein diet and its relationship with obesity were detailed in the American Journal of Clinical Nutrition. The study was connected with the American Society for Nutrition and was funded by the National Institutes of Health, National Pork Board, National Dairy Council, Purdue Ingestive Behavior Research Center and Beef Checkoff.