Info provided by Dr. Robynne Chutkan, gastroenterologist at Georgetown Hospital. Main article on 9 Facts about Poop found
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The ideal poop is a "continuous log" — and sinks to the bottom of the toilet
There are some doctors that say pooping three times a week is sufficient, but Chutkan says that you should probably make a bowel movement every day — assuming you're eating food every day. (In some cases, irregularity can actually be caused by extreme stress, as hormones like adrenaline and cortisol can slow down the digestive process.)
Under ideal conditions, she says, "it should be very easy to pass — almost effortless." And it should take the form of a continuous log or two, with a diameter similar to that of a circle you can make with your index finger and thumb.
Finally, poop should sink, not float. Floating stool is usually a sign of poor nutrient absorption or excessive gas.
Of course, poops come in all shapes and sizes — as shown in the Bristol stool scale, created by the University of Bristol's Ken Heaton, at right — but Chutkan says the ideal poop is a three or four on the scale.
If your poop isn't a perfect, easy, continuous log, it's not necessarily a sign that you're sick. But it may be a sign that you're not eating enough fiber, or that your gut microbiome isn't in great shape.