Testing Your Vitamin D Level. (By WebMd)

Testing Your Vitamin D Level

There's a simple blood test used to check your vitamin D level, called the 25-hydroxyvitamin D test.

 Current guidelines by the Institute of Medicine set a blood level of 20 nanograms per milliliter (ng/mL) as a goal for good bone health and overall health. 

However, some doctors say people should go higher, to about 30 ng/mL to get the full health benefits of vitamin D.

Info source

http://www.m.webmd.com/food-recipes/ss/slideshow-vitamin-d-overview?ecd=wnl_day_070813&ctr=wnl-day-070813_ld-stry&mb=GULHw1r0yczQttMGkoWNR%40HnVev1imbCX2R%2fDNcXcrE%3d