Circadian Cycles
The New England Journal of Medicine recently had a review article on circadian mechanisms. What was once thought to simply control sleep/wake periodicity and females’ monthly cycles is now known to control our complex physiology even down to a cellular level. Also, they are not unique to humans but have been present in all life forms (plant and animal) for the past 3 billion years. This universal presence indicates that circadian cycles are critical for both fitness and survival of…