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Someone with mild symptoms and a gut condition may still need injections, while someone with lower numbers and healthy digestion may respond well to oral B12
PubMed ID: 11713213 Ng FM et al
Prepared vials should remain refrigerated between 2-8C and protected from repeated temperature changes
The same studies can be located independently on PubMed using the CAS number (13441-78-4) or the compound name
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