vitamin b12 injection dose once a month Sandoz Injectable Solution - 1000 mcg/10 mL Compounded Hydroxocobalamin (Vitamin B12) Injection

They use passive diffusion to absorb B12 without intrinsic factor

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B12 shots put the vitamin straight into your bloodstream, so they skip over the digestive step

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Vitamin B12 and folate deficiency can cause a wide range of problems, including: extreme tiredness a lack of energy pins and needles (paraesthesia) a sore and red tongue mouth ulcers muscle weakness disturbed vision psychological problems, which may include depression and confusion problems with memory, understanding and judgement Some of these problems can also happen if you have a deficiency in vitamin B12 or folate but do not have anaemia