High ionized calcium levels were associated with an increased risk for hyperparathyroidism, especially among men.

Normal results indicate that your calcium levels ... Excessive vitamin D intake Hyperparathyroidism (when your parathyroid ...

Over the past few decades, the "normal" blood level of vitamin D (25-OH vitamin D) was based on the amount needed to keep PTH from becoming abnormally high. Again, PTH at high levels can cause ...

Secondary hyperparathyroidism is characterized by normal calcium but high parathyroid hormone levels, whereas pseudohypoparathyroidism is associated with low calcium and high parathyroid hormone ...

Seventy-nine percent of calcium levels and 81% of parathyroid hormone levels were within normal range. There were 19 patients with a history of symptomatic hypocalcemia, for whom any available ...