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Some people start with weekly doses to quickly replenish depleted stores, while others may only require monthly injections for maintenance
That role is real and well described in biochemistry
The interaction very rarely results in a pernicious anemia that appears reversible with discontinuation of metformin or with Methylcobalamin, vitamin B12 supplementation
B12 injections deliver vitamin B12 directly into the bloodstream, avoiding the digestive system where absorption can fail
Synthetic B12 is simply the name for the vitamin when it is not found naturally in food
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