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Think of it as powerful self-care, designed to keep your tank full so you can feel your best every day
The researchers weren't sure why
Cyanocobalamin works but requires more metabolic conversion and releases trace cyanide (clinically insignificant at normal doses, but unnecessary when better forms exist)
Lifelong treatment may be needed when the body is unlikely to regain the ability to absorb enough vitamin B12, such as autoimmune gastritis or the major surgical causes identified by NICE
For patients with these conditions, a maintenance schedule of injections every one to three months is typical after getting their levels back up
B12 injections go straight into your muscle and bloodstream, so your body takes up most of the dose, while oral B12 has to pass through your digestive system first, where only a small fraction of a tablet gets absorbed
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