What Is the Normal B12 Range in Adults?
Last Updated Apr 8, 2020 8:08:23 AM ET
The normal blood level of vitamin B12 in adults is 200 to 900 picograms per milliliter, according to MedlinePlus. Values below 200 picograms per milliliter indicate vitamin B12 deficiency in most adults, although elderly people with levels from 200 to 500 picograms per milliliter may experience deficiency symptoms.
Malabsorption diseases, such as Crohn's disease and celiac disease, can cause B12 deficiency, reports MedlinePlus. Hyperthyroidism, pregnancy and the absence of a protein that the intestines need to absorb vitamin B12 are other causes. Lack of a sufficient amount of B12 in the diet may also cause deficiency, although this usually only occurs in people following strict vegetarian diets.
More From Reference
What Features Does Infinite Campus Offer for Students?
Stay Up-to-Date in 2021 With These Custom Photo Calendar Ideas
How to Change Your Mailing Address Online
10 Must-Watch TED Talks That Have the Power to Change Your Life
Strange Americana: Does Video Footage of Bigfoot Really Exist?
How the COVID-19 Pandemic Will Change In-Person Retail Shopping in Lasting Ways