The Niemann-Pick C1-like protein (NPC1L1) in the proximal intestine binds most tightly to cholesterol, acting as a 'ticket taker' for sterol absorption.

“so this niemann-pick c1 like protein in our proximal intestine recognizes sterols and there's a sterile domain on air that binds tightly to sterols but it binds most tightly to cholesterol because cholesterol has that structure it has a less added finding to a phytosterols minimal binding to a stand all”