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Description
Key Takeaways Metformin is one of the few commonly prescribed medications consistently linked to vitamin B12 deficiency
Validity period management The unopened preparation has a shelf life of 36 months, which is shortened to 7 days after opening
For example: People with gastrointestinal disorders (like Crohns disease or celiac disease) might need more B12 because they absorb less
It clearly states in the guidelines not to retest
