Medically reviewed by Soma Mandal, MD A vitamin D test is a blood test that measures the level of vitamin D (calciferol) in ...

Vitamin D3 seemed more effective than D2 at raising this important blood test. Furthermore, preliminary work showed that enzymes in the liver and the final vitamin D receptors (VDR) in important ...

10 mcg = 400 IU. 15 mcg = 600 IU. 20 mcg = 800 IU. It is much easier to access the patient’s need after a vitamin D blood test. Few individuals would allow their clinician to simply guess an ...

New research finds that taking a daily vitamin D supplement may help lower blood pressure, especially for older adults with ...