The psyllium fiber in Metamucil helps lower cholesterol to promote heart health† by trapping some cholesterol in the digestive system to be removed with waste. When you take psyllium fiber, it forms a gel-like substance that moves through your digestive system. The gel traps some bile in your gut, requiring your liver to remove bad (LDL) cholesterol from the bloodstream to make more bile, which is needed for proper digestion.

Metamucil? One 60 year old guy recommended it for achieving weight-loss goals. Got me curious.

I think mostly it helps by filling you up with fiber so you eat less cholesterol foods. Supposedly, there is a mechanism for less cholesterol absorption too, as the first jelly posted, but I have my doubts.