Apolipoprotein B is the orange protein on the right side of the yellow cholesterol carrier. The Epoch Times/Shutterstock

For some people, a normal cholesterol reading doesn’t always mean there’s nothing to worry about. For about the price of a dinner out, a simple blood test can reveal a hidden layer of heart disease risk that standard cholesterol tests often miss.

Yet it isn’t part of routine cholesterol screenings, so most doctors do not order it.

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