In 2015, Chandra Jackson and his team studied the dose response relationship between diabetes risk and sleep duration. Data were analyzed from 18,443 cases of type 2 diabetes. The study found that there was low risk for those who slept for about 8 hours a day. Jackson said that when circadian rhythm is disrupted such as shift work, it affects the metabolic process. The body release hormones throughout the 24 hours. Problems with insulin metabolism and weight gain start to occur when someone eats at hormones haven’t been primed to respond to food.