A study on intestinal 47Ca absorption test by employing scintillation camera.

The intestinal calcistat: Determinant of clinical vitamin D deficiency

“…Literature search reveals that there is paucity of studies assessing effect of PTH on calcium absorption directly. [910] In subjects with primary hyperparathyroidism, hypercalcemia is maintained by increased renal calcium re-absorption and bone resorption. [11] Similarly, in patients with hypoparathyroidism, hypocalcemia is caused by renal calcium wasting, rather than a decrease in calcium absorption.…”