Should You Get a Vitamin D Test? Research is beginning to show that Vitamin D is more important to health than ever imagined. Researchers are finding that a HUGE percentage of the population, up to 85%, is Vitamin D Deficient. And because of this, researchers are now recommending that EVERYONE get a Vitamin D Blood Test done every year. Major Vitamin D Researchers have found that up to 75% of Breast and Colon Cancers could be completely prevented if everyone were to have Vitamin D Levels of between 40-60 ng/ml on a Vitamin D Test.(11) This level is MUCH HIGHER than the so-called 'normal' level on the Vitamin D Blood Test Laboratory Slip that comes from the lab. Watch the video below to find out why testing is so