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Other factors that can sometimes cause phosphate levels to rise include excess vitamin D, decrease in magnesium levels in the body and for women, pregnancy. Low phosphate levels, on the other hand are indicative of hyperparathyroidism, osteomalacia, kidney and liver infections, lack of vitamin D and intense burns.
Phosphorus intake above 4000 mg/day (130 mmol/day) causes only small elevations in serum phosphate concentrations as long as the intake is distributed over the course of the day. If, however, an acute phosphate load is given over several hours, transient hyperphosphatemia will ensue.