Excess salt has to be excreted through the kidneys, but salt binds to calcium on its way out, creating a greater concentration of calcium in the urine and the kidneys.

• 过多的盐分必须通过肾排泄，但当盐和钙在排泄过程中结合在一起时，它们会在尿液和肾内形成一种更浓的钙质。