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The usual daily recommended amounts of methylcobalamin, vitamin B12 either through dietary intake or supplementation should be taken during pregnancy (see Dosage)
Exploring the world of B12 Shots & B12 Injections: The Good, Bad, and Alternative
If someone has a serious B12 shortage, it might take several doses to feel energized again
Having an intestinal disorder resulting in less stomach acid : Research suggests that these include conditions like gastritis, hypochlorhydria or achlorhydria
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