Causes of hyperphosphatemia (abnormally elevated
phosphate levels) include excessive dietary intake of
phosphate, overuse of laxatives or enemas that contain phosphate, kidney disease or impaired kidney function, hypoparathyroidism, hypocalcemia (calcium deficiency), magnesium deficiency (severe magnesium deficiency is one of the causes of hypoparathyroidism), too much vitamin D in the body, healing fractures, severe infections, acromegaly, rhabdomyolysis, tumour lysis syndrome, untreated diab