i have been taking meds to bring my cholesterol down, and since then have noticed a whits substance in my stools once in a while. one day i saw what i thought was some white plastic thing floating in the toilet, i had to find out what it was, and it was hard and hollow...then seeing another one after the next bowel movement, i wanted to bring this sample to my doctor. these are about 1/2 inch in diameter and kind of squat in shape, maybe a little less than 1/2 inch in height...it reminded me of a pearl onion which i have not eaten lately, the "shell" was hard but easy to cut open with a box cutter and was filled with a chartrues, kind of greenish yellow colored substance that was fairly thick. so i know this is not a pill capsule remnants. any idea what it might be?