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but that discomfort is nothing compared to a lifetime of neurological damage and suffering from an untreated B12 deficiency

Proteinuria in cubilin-deficient patients with selective vitamin B12 malabsorption

Important note: The serum test measures total vitamin B12, including both the active (holo-transcobalamin) and inactive forms

Some prefer mixing in the same syringe for fewer injections, while others administer separately to allow individual tracking
