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Functional deficiency can still cause serious and lasting neurological harm, and additional markers like MMA should be measured when the symptoms point to B12 involvement. Get yourself a copy of your original diagnosis notes if you can
Please note that I.G
Transaminases, bilirubin, alkaline phosphatase, albumin, and markers of synthetic function point toward a hepatic cause when they are abnormal
How Vitamin B12 Supports Nervous System Health The nervous system depends on steady vitamin B12 levels to work correctly
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