Eli5 How does cholesterol get from your intestine into your arteries and how does ingested fiber help lower the cholesterol in your arteries?
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Digestive enzymes make cholesteral soluble in blood plasma. This new solution diffuses through the intestinal wall into the bloodstream which carries it throughout the body along with the rest of our nutrients. These diffuse into whichever cells have a lower nutrient concentrations, or which are equipped to actively bind with and absorb them.
Fibre increases food’s volume to nutrient ratio and softens the digestive slurry. Mixing fibre into your food shortens the time it spends in your digestive tract, and prevents some nutrients from saturating the bloodstream during digestion. In other words, it makes rates of absorbtion more uniform.
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