Did you know that Stress and Adrenal function can affect sleep, particularly the circadian pattern of cortisol secretion by the adrenal glands? Circulating cortisol normally rises and falls throughout the 24-hour daily cycle, and is typically highest at around 8 AM and lowest between midnight and 4 AM. Both high and low nighttime cortisol levels can interrupt sound sleep. When the adrenals fatigue, adrenal hormone … Continue reading Diurnal Cortisol Curve