It is a known fact that sleeping is very important to the body. Without sleep, it is very likely that the body's stress hormones will increase. People who had less sleep had higher blood levels of the stress hormone, cortisol, according to the samples taken by the University of Chicago. The stress hormone, cortisol, is shown in the picture on the right. The blue substance is the cortisol and it is released as a reaction to stress. Without sufficient sleep, the body will release more cortisol, which may affect the body's health negatively.
Messer, A'ndrea. "Stress hormone raises obesity risk in girls." Futrurity. Futrurity, 22,Feb, 2011. Web. 7 Jun 2011. .
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