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Preventing or correcting B12 deficiency is crucial for overall health

Vitamin B12 is essential for red blood cell production, nerve function, and DNA synthesis

Vitamin D, vitamin B12, and ferritin require testing before supplementing, but also give great results so be sure to request lab tests for these three nutrients, to see if you would benefit from supplementation

Different kinds of cobalamin are more or less interchangeable, and the body can either use them as-is or easily convert them to the form it needs

This may be complemented by tests such as electromyography, ultrasound, and magnetic resonance elastography