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Low levels are often linked to brain fog, poor concentration, and slower cognitive performance
That process typically takes eight months to two years
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For those with irreversible causes such as pernicious anaemia or malabsorption, injections are usually given every 23 months
About Chemist2U Dr Matthew Cullen is the Chief Executive Officer and Founder of Chemist2U
Disclaimer: *These statements have not been evaluated by the Food and Drug Administration
The Secretary of State for Health, all NHS bodies, private and voluntary sector providers supplying NHS services, and local authorities in the exercise of their public health functions are required by law to take account of this Constitution in their decisions and actions
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