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Trillions of Cholesterol Molecules in Blood

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Created October 5, 2025

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Your blood is swimming with trillions upon trillions of cholesterol molecules. It sounds wild,

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but it's just basic chemistry. The molar concentration of cholesterol in normal blood is

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about 0.005 M. So, if we take a 750 milliliter sample, about the size of

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a large drink, we can figure out exactly how many molecules that is. Using the molarity

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and Avogadro's number, the math reveals a staggering figure. You're looking at roughly 2.26 times

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10 to the 21 molecules. That’s over two sextillion cholesterol molecules, just in that small

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sample of your blood.

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