Dietary salt, urinary calcium, and kidney stone risk.
Both salt-loading studies and reports of free-living populations find that urinary calcium excretion increases approximately 1 mmol (40 mg) for each 100 mmol (2300 mg) increase in dietary sodium in normal adults. Renal calcium stone-formers with hypercalciuria appear to have greater proportional increases in urinary calcium (approximately 2 mmol) per 100 mmol increase in salt intake. Thus, reduction of dietary NaCl may be a useful strategy to decrease the risk of forming calcium-containing kidney stones.
Massey
L K
LK
Washington State University, Spokane, USA.
Whiting
S J
SJ
D002118:Calcium / Q000652:urine*; D006801:Humans; D007669:Kidney Calculi / Q000209:etiology* / Q000517:prevention & control; D012307:Risk Factors; D012964:Sodium / Q000652:urine; D017673:Sodium Chloride, Dietary / Q000008:administration & dosage*
D017673:Sodium Chloride, Dietary; D012964:Sodium; D002118:Calcium