is injection necessary for b12 deficiency Shots: Vitamin B12 Injections Benefits, Uses, Risks How Long Does It Take
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doi: 10.4161/org.6.1.11121

Higher absorption for large doses : For large oral doses of supplemental vitamin B12 (25010,000 mcg), approximately 0.9 to 1.2% is absorbed through passive diffusion, which does not require intrinsic factor

Its estimated that up to 13% of people over 60 have low levels of vitamin B12(2)

The 10mg format requires particular attention to aliquoting discipline, given the larger compound volume
