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Missing Medical Necessity The diagnosis should clearly justify the injection
Vegetarians and vegans need fortified foods and supplements to get enough
Dose is too low
Some practitioners implement cycling approaches (such as 12 weeks on, 4-8 weeks off), though no published research directly compares continuous versus cycled protocols
Correcting B12 changes your metabolism and nervous-system signalling, and that adjustment itself can feel like tiredness, lightheadedness or a vague off feeling before things settle
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