If your toilet allows, a habit of inspecting your poop can also give you early warning of irregularities

This could be a useful habit anyways. Very roughly speaking: gray poop - liver, floaty greasy poop - pancreas, undigested poop - small intestine, black poop - proximal bleeding, bloody poop - distal bleeding, watery poop - lactose intolerance or inflammation, rock solid poop - diet lacking fiber.