1. Introduction Feeling completely drained of energy by two in the afternoon is a widespread and generally normal physiological phenomenon driven by the natural dip in the human circadian rhythm, often exacerbated by postprandial somnolence following the midday meal. The human body does not maintain a steady state of alertness throughout the day; instead, it … Read more
1. Introduction Profound sleepiness after eating lunch is primarily caused by postprandial somnolence, a physiological state where blood flow is redirected to the digestive tract, and a natural circadian rhythm dip occurring in the early afternoon. When a large meal rich in carbohydrates and proteins is consumed, the body releases a cascade of hormones including … Read more
1. Introduction Afternoon brain fog is primarily caused by a natural dip in the circadian rhythm, postprandial somnolence following a heavy lunch, and progressive cognitive fatigue from sustained mental focus. Around mid-afternoon, core body temperature drops slightly and the sleep-inducing chemical adenosine accumulates in the brain, triggering a physiological urge to rest and a distinct … Read more