5-5-25 Set to private at the direction of the recommendation of the Mayo legal team due to unresolved copyright issues. This is due to recent law suits over copyright issues. (Tim) Mayo Clinic Human Optimization Project: Understanding Your Circadian Rhythm | The Foundation for Health, Quality Sleep You’ve likely heard of the concept of the “Circadian Rhythm,” but you may not fully understand it. Most people have no idea what their personal circadian rhythm is or how to determine it. Similarly,