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Frequently Asked Questions How long does it take to feel the effects of B12 injections
and Kopchick, J
Estradiol injection
Plant foods do not naturally contain active B12 some fortified foods (plant milks, nutritional yeast) and supplements can help, but injections bypass any absorption issues entirely
However, suppose you dont take a B12 supplement or get shots
Some patients may notice symptoms returning before their next scheduled injection, particularly if they have higher metabolic demands or ongoing neurological involvement
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