Urine calcium
Urinary calcium refers to the determination of calcium concentration in urine for 24 hours. Calcium is one of the most abundant elements in the body, with an average total body content of about 1 kg, mainly distributed in the bones. Changes in urinary calcium can reflect changes in blood calcium, but urinary calcium values vary greatly. Calcium, protein intake, and phosphorus excretion can affect calcium excretion. High urinary phosphorus results in low calcium.
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