Tag: B12 blood test

While a vitamin B12 deficiency can lead to serious health issues, research indicates that having an excessively high level of B12 in the blood may signal underlying medical conditions. Though a high B12 level itself is often harmless, it can be a biomarker pointing to potential problems with the liver, kidneys, or blood.

According to the National Institutes of Health, a B12 insufficiency is more common than a deficiency, affecting approximately 12.5% of adults. This guide will detail what is a normal B12 level for adults, explain the different measurement ranges, and discuss the implications of low or high levels.