Cholesterol is an energy-intensive molecule to produce, and as such, your body recycles it as much as possible. Your liver produces cholesterol to be released with bile into your digestive track (to aid with fat absorption), but your body re-absorbs that cholesterol, along with any additional dietary cholesterol, back into your bloodstream in the intestines.

If you want to pass the cholesterol out (dietary or otherwise), then eat more fiber, which sticks to cholesterol and prevents your body from reabsorbing it.