Stanols, such as cholesterol saturated at the C5-C6 double bond, are saturated sterols that cannot be absorbed in the intestine.

“but a stain all is you take and let's take cholesterol as a stand off our star wall and remember cholesterol at the third carbons in O H group there's a double bond at carbon 5 to 6 in the first ring and then there's that tail at carbon 17 if i desaturate it cholesterol the double bond at c5 and 6 disappears that's called cholesterol it's a stain or a stain all essentially a saturated star all changes the characteristics of that my cholesterol free cholesterol can be readily absorbed in your intestinal Walk stanols cannot be absorbed”