The Vitamin D Blood Test (25-OH Vitamin D): Who, How, When, and Where Clinically speaking, things began to change in the 1970s when the blood test for vitamin D (known as the "25-OH vitamin D ...

The guidelines also state that routine testing for vitamin D levels is "unnecessary" for these individuals. The daily recommendation for vitamin D is 600 IU per day for people aged 1 to 70 years old.

Double-blind trial: it appears to be common sense – testing the efficacy of a molecule ... Genotyping: delivering vitamin D to patients with MS-related mutations in the genes coding for VDR ...