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Because it doesnt require conversion, Methyl B12 is more effective for many people especially those with genetic variations in methylation enzymes (like MTHFR)
use a 29, 31 gauge needle at 90 degrees for adequate subcutaneous tissue
Some NHS/ICB guidance notes oral options for dietary-related deficiency, and that long-term injection schedules depend on the cause
B12 injections are not automatically better for everyone
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