According to WebMD, the normal range for vitamin D is 20 ng/mL to 50 ng/mL. Anything below 12 ng/mL is considered deficient and requires a consultation from a physician.Continue Reading
Above 125 nanomoles per liter, the blood becomes flooded with excess calcium, notes the National Institutes of Health.
There are three sources of vitamin D, claims the NIH: sun exposure, food and supplements. Vitamin D is present in only a few food sources, including seafood such as salmon and cod liver oil, lists Nutrition Data.
An individual's vitamin D level is commonly measured with a blood test called 25-hydroxyvitamin D, according to the Vitamin D Council. Individuals should consult with a doctor to test their vitamin D level and, if necessary, determine a safe amount of daily vitamin D supplementation.
Vitamin D is most commonly absorbed from the sun, but it can also be found in foods like fish, milk, and eggs. Vegetarians and people with milk allergies are at the highest risk for developing a vitamin D deficiency. The National Institute of Health lists the primary symptoms of vitamin D deficiency as bone pain and muscle weakness, and children with vitamin D deficiency are also at risk of developing rickets, a condition that causes soft bones and bone abnormalities.Learn more about Vitamins & Supplements