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Final Thoughts vitamin B12 overdose is extremely rare , taking excessive amounts through supplements or injections may cause mild side effects in some individuals
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Anyone suspecting B12 deficiency especially with neurological symptoms should seek GP review promptly rather than self-treating with over-the-counter supplements
BAC water is strongly preferred for this reason
choose whichever youll take consistently (NIH ODS)
A 10 mg vial covers 20 weeks at 0.5 mg, 10 weeks at 1 mg, 5 weeks at 2 mg, and about 2.5 weeks at 4 mg weekly
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