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is vitamin b12 injections safe during pregnancy Pregnancy: Should You Take It & How Much? Vitamin B12 Supplements for Pregnancy:
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10.1186/s12944-020-01286-8 71 KomatsuM.KandaT.UraiH.KurokochiA.KitahamaR.ShigakiS.et al (2018)

Thank you Cyrus

That is a genetic-knockdown study in mice, not a drug trial: it tells you the target is real and metabolically meaningful in an animal model, but it does not test a drug, a dose, or a route

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