While oral B12 supplements are available, vitamin B12 injections have advantages including enhanced absorption since it bypasses digestion, a fast-acting energy boost from quick absorption, higher blood levels reached versus pills, lasting benefits between maintenance doses, improved concentration and mental clarity, and often more affordable and convenient long-term
The biggest risk comes from the injection
Pregnant women are recommended to consume the amount of vitamin B12 as advised by the Food and Nutrition Board, National Academy of Sciences-National Research Council, which is 4 mcg daily
While the energetic effects fade after 2 to 4 weeks, vitamin B12 itself continues to be stored in the liver and can remain available for years
Ethics declarations Competing interests SJW is the founder of Ridgeline Therapeutics, HN is a paid employee of Ridgeline Therapeutics and, since manuscript submission, ADW has also become a paid employee of Ridgeline Therapeutics
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