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Archived from the original on 27 November 2019
Why does Methylcobalamin (B12) Injection need light protection
If oral B12 replacement has been trialled in a person with metformin-associated B12 deficiency, I would suggest that a repeat measurement of B12 levels after 812 weeks is a good time to reassess whether absorption is adequate or whether a switch to intramuscular replacement is required
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