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The exact prevalence of vitamin B12 deficiency in industrialised countries is unknown
If you see any air bubbles, lightly tap or flick the syringe to draw the bubbles to the top (the end with the needle) and expel the air
Ideally, blood tests (including full blood count, serum B12, folate, and possibly anti-intrinsic factor antibodies if pernicious anaemia is suspected) should be performed before starting supplements, as supplementation can affect test results
Once reconstituted, solutions require immediate refrigeration between 2C to 8C to maintain molecular integrity over subsequent experimental phases
Stomach acid and digestive enzymes can break it down, meaning only a fraction of the vitamin may actually enter your bloodstream
Periodic monitoring may be advised during prolonged treatment
