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Vitamin B12 deficiency is more prevalent than many people realise: Around 6% of the UK population has B12 deficiency This rises to approximately 20% in those over 60 An estimated 1 in 10 people in the UK may have inadequate B12 levels 6% of men and 10% of women aged 19-64 have low serum B12 concentrations Among women of reproductive age (19-49), 11% have low B12 Interestingly, research suggests that deficiency is often due to absorption problems rather than dietary intake
This uncertainty is one of the challenges with using compounds that lack regulatory approval
Some feel sharp changes within two or three days
A 55-year-old woman suffered an allergic reaction after her second dose of an intramuscular cyanocobalamin B12 shot
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