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In some circles this route has been regarded as an effective alternative to parenteral administration since the 1950s, during which time several studies showed serum vitamin B12 concentration to normalise after taking large oral doses
Honestly, if I had known it was this easy I would have done it earlier
It plays a vital role in brain function and the production of DNA and red blood cells
Generally, the effects of Vitamin B12 injections start waning after a week
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