Vitamin D Test

Too late to get your hands on my doctors' offices.

no its not necessary

No.
However, it is not usual to order just one test. Is it for others? If there is a "comprehensive metabolic panel" or something like that on the form, be fasting.

I could not find the answer on one of the websites I visited, it's a good question. I suppose you would not be less load on the fish oil, cod liver drink, or D-fortified dairy products before the test that could distort the results would be higher. I am not certified in clinical laboratory analysis.

I guess they are testing for both D2 and D3 levels, here are some good links to help iinterpert
tests:

http://www.merck.com/mmpe/sec01/ch004/ch ... D & alt = sh # C01-ch004-ch004l-440

http://www.labtestsonline.org/understand ...