How to calculate the requirements for the calcium in body, Biology

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How to Calculate the Requirements for the Calcium in Body?

Requirements for calcium depend upon the rate at which calcium is incorporated into bone; they are therefore highest during periods of growth, especially during infancy and adolescence and fall after peak bone mass is achieved at about 25 years of age. The RDA for Indian adult male is based on replacing the losses of calcium in urine, stools, bile and sweat, which is estimated to be 700 mg calcium per day. The fractional absorption in adults is taken to be 20-30% in the presence of adequate vitamin D. Additional calcium for growth, pregnancy and lactation are calculated separately. The ICMR recommended dietary intake per day for calcium has been given in Table.

Table: Daily requirements of calcium and phosphorus

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