Why Does Coffee Make You Poop? The Science Explained 2026

Why does coffee make you poop science explained showing gastrocolic reflex and digestive system diagram

If you need the bathroom within 20 minutes of your morning coffee, you are not imagining it and you are not alone. A 1990 study published in the medical journal Gut surveyed 99 healthy volunteers and found that 29% reported an urge to defecate after drinking coffee. The same study measured actual colon activity and … Read more