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It is possible that compensatory mechanisms could develop that reduce efficacy with prolonged use
UK-licensed hydroxocobalamin injections are typically preservative-free single-use preparations, but it's always advisable to check the specific product's SmPC for excipient information if you suspect a sensitivity
Some patients benefit from weekly injections initially, tapering to monthly maintenance once levels normalize
What to do if you suspect a B12 deficiency Everlywell: exceptional care that meets you where you are Spotlight on Featured content 86% of cancers aren't caught by recommended screenings
Safe B12 Dosage and NHS Recommendations The NHS and UK health authorities provide clear guidance on appropriate vitamin B12 intake, emphasising that most people obtain sufficient amounts through diet alone
