Tag: Vitamin b12 testing

Approximately 3.6% of adults in the U.S. have a vitamin B12 deficiency, with the rate increasing significantly with age. Detecting this condition involves identifying key lab values that indicate B12 deficiency, including standard serum tests and more sensitive metabolic markers like MMA.

While excess water-soluble vitamins like B12 are typically harmlessly excreted, consistently high serum levels can be an important marker for underlying health conditions involving several major organs. This raises the question: what organs are affected by high B12, and what does it mean for your health?