Fiber helps lower cholesterol-is it a fact or purely nonsense?
Fiber, especially soluble fiber, can combine with "bile + cholesterol" mixture inside our intestine for excretion (see Figure 3). When the amount of "bile + cholesterol" mixture in our liver is low (due to the excretion mention previously), the liver needs more cholesterol to produce a mixture of "bile + cholesterol" mixture.
You must be wondering where does the liver get its cholesterol? The liver extracts cholesterol from our blood circulation to produce "bile + cholesterol" mixture. Therefore, this explains how fiber reduces cholesterol in our blood.