the initial negative effect on the osteocytes , chondrocytes and osteoblasts is attributed to a direct toxic effect of excessive dietary vitamin d3 since hypoparathyroidism and hypercalcitoninism , which occur secondarily to hypercalcemia , could not account for the rapid appearance of this effect , nor are they known to induce osteocytic death .
C0008318
vitamin
C0020626
hypoparathyroidism