Morning poop vs evening poop: What the timing reveals about metabolism

Most people don’t think much about when they poop, but the timing reveals how their gut and metabolism are working together. Our bowel movements follow a circadian rhythm, the same internal 24-hour clock that regulates sleep, hormones, and digestion. Research shows the colon is most active in the early hours after waking, which is why many people have morning stools. If someone regularly poops in the evening or at unpredictable times, it may signal shifts in their gut clock, stress levels, or eating patterns. By paying attention to when things “go,” it’s possible to learn small but powerful things about overall metabolic health, without being weirded out by the topic. Human colonic activity is not constant; it peaks around wake time. A detailed review showed that colon motility