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In a case series study from New York of people with overt neurological symptoms from B12 malabsorption, MMA levels ranged from 755 to 187,000 nmol/l (Lindenbaum, 1988)
For anemia (as shown on an iron test), try supplementing with riboflavin along with your iron
The 5mg vial dosing guide covers practical preparation
Refrigeration is permitted but unnecessary while the vial is unopened
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