Without enough, you might feel tired, weak, and have nerve problems
Mayo Clinic Proceedings: Innovations, Quality & Outcomes , vol
The same is true if your blood work only shows signs of mild abnormalities: high levels of reticulocytes (immature red blood cells), homocysteine (an amino acid broken down by vitamin B12), or methylmalonic acid (MMA, a byproduct of amino acid breakdown) should subside after just a few vitamin B12 injection treatments
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Frequently asked questions What is the usual vitamin B12 dosage for adults
These results help you and your doctor figure out if your issue is likely dietary or something more complex