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However, it may only work if you are deficient or inadequate in vitamin B12 or have a chronic health condition, like myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) or megaloblastic anemia (see next point)
Adults need around 2.4 micrograms (mcg) of vitamin B12 a day, and women who are pregnant or breastfeeding need more
NICE guidance recommends early referral (within 3 working days) for suspected persistent synovitis to enable prompt initiation of disease-modifying therapy where appropriate
If a vegan or vegetarian person has developed symptoms despite B12 supplements we advise him or her to see a doctor who knows about deficiency among vegans and vegetarians
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