What is the specific purpose of thoroughly rinsing canned black beans under cold water before preparing them?

Answer

Rinsing significantly reduces the high sodium load often found in the liquid preservative.

Canned food products often use liquids high in sodium to act as a preservative and maintain texture. For black beans, this excess sodium must be addressed if one intends to reap the cardiovascular benefits, particularly regarding blood pressure regulation. A thorough rinse under cold running water is a simple, effective practice that washes away a substantial portion of this external sodium clinging to the beans or suspended in the canning liquid. This action directly supports the goal of managing blood pressure by lowering overall dietary sodium intake associated with that serving.

What is the specific purpose of thoroughly rinsing canned black beans under cold water before preparing them?
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