Hello Dr. Boone,
I have low vitamin D 25 (19), high vitamins D 1-25 (79), high end of normal calcium (high 9’s), and PTH typically in the high 40’s (same blood draw). I am a 42 years old. I also have calcium phosphate kidney stones. However, due to all of my labs being “normal” other than vitamin D, I have been told I do not have hyperparathyroidism. Can low vitamin D mask the disease? Vit. D supplements make me terribly sick from and I develop stroke symptoms when taking. Therefore, I stopped taking the recommended vitamin D. Without taking the vit d I feel significantly better. Any help is appreciated. Thank you.
Thanks for writing. Low Vitamin D levels are associated with primary hyperparathyroidism, but do not diagnose it. The diagnosis of primary hyperparathyroidism relies mostly on calcium and PTH levels. Sometimes Vitamin D levels can help support the diagnosis (or point away from it). But with calcium and PTH levels in the true normal range, Vitamin D does not play a big role in the diagnosis of p...