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Still follow all safety precautions, especially around hydration and blood sugar monitoring
Pancewicz et al., Medical Science Monitor, 11-12/01 Cheryl Myers Cheryl Myers, RN, is an integrative health nurse, author, and expert on natural medicine
While very high oral doses (1,000 to 2,000 mcg) can achieve some passive absorption without intrinsic factor roughly 1% of the dose is absorbed passively many clinicians prefer the reliability and rapid correction offered by injections in this population
PubMed , Biochimica Et Biophysica Acta
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