Your body might have B12 floating around in your bloodstream, but if it can't get inside the cells where the real work happens, you'll still experience the symptoms of a deficiency
Why Injections Beat Pills (For Most People) The simple math: injectable B12 bypasses the stomach acid, liver metabolism, and intestinal absorption issues that limit oral B12 to about 1% bioavailability in most adults
Andreas Birkenfeld, co-author of the study and research group leader at the Paul Langerhans Institute Dresden of Helmholtz Zentrum Mnchen at the University Hospital Carl Gustav Carus and the Medical Faculty of TU Dresden
It means paying more, waiting longer, and accepting oversight in exchange for certainty about what youre putting in your body
For topical uses, take a small dab of cotton and put it over the affected area without applying much pressure