Raised in tumoral calcinosis, primary hyperparathyroidism, idopathic hypercalciuria and scarcoidosis as well as normal growing children and pregnant lactating females. Depressed in chronic renal failure, vitamin D dependent rickets, pseudohypoparathyroidism and tumor induced osteomalacia. This is the preferred test for vitamin D levels (also known as 25-hydroxyvitamin D).
Sample Collection Instructions:
Finger-prick blood-spot or Gold top (SST) blood collection tube.