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The vial should remain sealed and sterile until it is ready to be used
How do doctors treat B12 deficiency caused by nitrous oxide
NICE guidance recommends intramuscular hydroxocobalamin as first-line treatment for B12 deficiency caused by pernicious anaemia or malabsorption
Supplements: Getting B12 and Iron Naturally Supplements can be helpful, but eating foods naturally rich in vitamin B12 and iron is better
You should not take vitamin A supplements with fish liver oil and liver or liver products such as pt, which contain high amounts of vitamin A
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