Standard testing for Vitamin D levels involves a two-step process:
A patient is given a standard intravenous blood extraction, similar to the usual blood test conducted during an annual physical.
Blood samples are then examined for the presence of 25-hydroxyvitamin D or Vitamin D.
The universal standard for Vitamin-D sufficiency is 50-80 ng/mL. Anything below that level is considered Vitamin D deficiency, while anything below 29 ng/mL is considered Vitamin D insufficiency.
In order to maintain this level, the following doses are required:
Infants, aged 0-12 months, must receive at least 400 IU Daily.
Children and Teenagers, aged 1-18 years must receive at least 600 IU daily.
Adults, 19 and up, must receive at least 800 IU daily.