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The Best Way to Test for Vitamin B12 Deficiency A diagnosis of B12 deficiency should not be dismissed based solely on a single measurement
Start conservative with a 50-100mg twice-weekly protocol, properly mixed at 50mg/mL concentration for easy measurement
According to MHRA product information for hydroxocobalamin (the standard injectable form used in the UK), common side effects include injection site reactions and occasional hypersensitivity reactions, but anxiety is not listed as a recognised adverse effect of B12 supplementation
When Oral B12 Works Best Taking oral B12 is a good choice to maintain daily health, address mild issues, or provide easy supplementation
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