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Unfortunately, our food quality isnt what it used to be or we have genetic markers that make it harder for us to absorb nutrients

It is sold exclusively as a research tool compound for in vitro laboratory use and is not intended for human consumption

Your baby may experience developmental delays and not grow properly due to B12 deficiency

[15] This complex consists of the following symptoms: Impaired perception of deep touch, pressure and vibration, loss of sense of touch, very annoying and persistent paresthesias Ataxia of dorsal column type Decrease or loss of deep muscle-tendon reflexes Pathological reflexes Babinski, Rossolimo and others, also severe paresis

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"Is there a "gold standard" for human serum vitamin B12 assay?"