Parathyroid Q&A is a community of experts and patients dedicated to understanding and treating Parathyroid Disease.

Vitamin D deficiency

Vitamin D deficiency is tricky. It is frequently found in primary hyperparathyroidism, but in this case the deficiency is caused by the parathyroid condition, and should not be treated. But Vitamin D deficiency can itself produce a separate parathyroid condition called secondary hyperparathyroidism, which is treated with Vitamin D supplementation. This can get confusing, even for physicians.