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However, there are no well-controlled studies in pregnant women, so this medication is generally recommended during pregnancy only when clearly needed

Methylcobalamin and adenosylcobalamin are pre-activated forms some practitioners prefer, particularly for individuals with genetic variations affecting B12 metabolism

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B12 is typically absorbed through the stomach, so if you havestomach issues or have taken many common medications you may not be able to absorb it as effectively

According to the NIH Office of Dietary Supplements, absorption issuesnot intake aloneare a leading cause of low B12 levels