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

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 ...

If a lab test reveals low levels of vitamin D, your healthcare provider may recommend supplementation. The safe upper limit for vitamin D supplementation is 4,000 IU or 100 mcg per day, so it’s ...

Scientists are looking for volunteers to take part in a trial to see if taking vitamin D can give the immune system ... for six months if a finger-prick test shows they are deficient in the ...

Some health insurances cover vitamin D testing and some do not, and prices vary from $10 to $50, so local laboratory costs should be checked before telling the patient that a vitamin D test is needed.