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Comparing the efficacy and tolerability of a new daily oral vitamin B12 formulation and intermittent intramuscular vitamin B12 in normalizing low cobalamin levels: a randomized, open-label, parallel-group study

Benzyl Alcohol Warning: Some forms of vitamin B12 injections contain benzyl alcohol

Important safety questions include product purity, dose accuracy, drug interactions, liver and kidney considerations, blood sugar changes, cardiovascular risk, pregnancy or breastfeeding status, and long-term exposure

This duration of safety monitoring provides meaningful reassurance about sustained exposure effects that would not be apparent in brief trials