The liver can excrete cholesterol into bile or convert it to bile salts for excretion.

“the liver has an interface with the biliary system and we have always known of course that's how the liver pumps bile salts into the bile that's how the liver is creats free cholesterol it pumps it into the bile which brings it down to your gut but if the liver needs cholesterol in a pinch what is a supersaturated body fluid full of cholesterol in your body your bile super cholesterol rich the liver can pull cholesterol back II flux it so to speak from the bile back into the liver why because what is also expressed to a Patou biliary surface the niemann-pick see one like protein”