The circadian rhythm of our bodies is managed by melatonin, a hormone that is anticancer, and regulates fatigue and restorative sleep cycles.  It is often related to the cycles of the sun: its rising and setting.  With age, there is a lowering of the levels of melatonin, which with poorer sleep, various problems often result: obesity, high blood pressure, depression, even bipolar, anxiety, adult onset diabetes (type II), even CVA (stroke), early dementia and death.  Sleep apnea can result even if one can get to sleep.  As one can figure, there are many functions of the body both physiological and emotional that need the balance of ‘normal’ levels of melatonin that in youth we all had. Source: Life Extension, Volume 28, Num. 7, pages 42-46

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