Wayne Campbell, Purdue University (IMAGE) Purdue University Caption Overweight and obese adults who are losing weight with a high-protein diet are more likely to sleep better, according to new research from Purdue University's Wayne Campbell, a professor of nutrition science. Credit Purdue University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.