What Are Normal Vitamin D Levels?


Quick Answer

A vitamin D level of between 50 and 125 nanomoles per liter is considered sufficient, states the National Institutes of Health. At a blood serum concentration below 50 nanomoles per liter, adults develop bone weakness, and children can develop rickets.

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What Are Normal Vitamin D Levels?
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Full Answer

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.

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