What are the actual levels?I have borderline B12 but GP says it's fine
I think @carol43 maybe referring to this book:What book?
Pills have issues with absorption for some people - those with pernicious anemia, those taking acid suppressing drugs, those on metformin, those with digestive issues, etc. Injections or sublingual absorption provides better bioavailability. There's also the issue that the B12 in OTC supplements is generally the non-activated/non-bioavailable form (cobalamin) rather than the activated methyl version.how about strong B12 pills in mega doses... have you tried them first +
Pills have issues with absorption for some people - those with pernicious anemia, those taking acid suppressing drugs, those on metformin, those with digestive issues, etc. Injections or sublingual absorption provides better bioavailability. There's also the issue that the B12 in OTC supplements is generally the non-activated/non-bioavailable form (cobalamin) rather than the activated methyl version.
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