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the RDA is 2.4 g/d
High levels in the blood dont always mean toxicity, but they may signal that the body isnt processing the vitamin efficiently.
B12 shots are more easily and quickly absorbed into the body and may be used initially to correct a serious deficiency
I have been more active this past year, attending boot camps and walking/running a lot
When youre low on energy, its harder to stay active or stick to a consistent exercise regimen
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