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Advanced considerations For researchers with experience in metabolic optimization, several advanced considerations may be relevant
Taking certain medicines for a long time, like proton pump inhibitors or metformin, can block B12 absorption
Get the details, in the Biotin section of our B Vitamin Supplements Review
Another factor that makes us the preferred choice for B12 injections is physician involvement
Anything higher than that quickly becomes too much volume for one subQ site, which is why oral capsules are the standard route
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