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Next 48 to 72 hours Most people see improvements across this window

Some experts recommend these injections for weight loss, as vitamin B12 is linked to obesity

Those who cant stick to oral iron therapy

Some patients might move from, say, weekly injections to monthly injections as maintenance, then eventually to none if possible

The NHS treatment guidance sets it out clearly: Loading phase: an injection of hydroxocobalamin every other day for about two weeks, or until symptoms stop improving

[16] [18] There is insufficient evidence to determine the risk of adverse outcomes in human pregnancies, and thus, use during pregnancy should be guided by clinical judgment and individual risk assessment