are b12 injections safe while pregnant Ever wonder why some prenatal supplements (including ours!) contain so much Vitamin B12? How much do you *actually* need!? What happens if you take too much? Is this even safe?! Vitamin B12 | The BMJ
Description
This natural regulatory mechanism provides substantial protection against toxicity from dietary sources or standard supplementation

doi: 10.1513/AnnalsATS.201312-423OC
[PubMed: 20520602] 95

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Why Oral Supplements Are Sometimes Not Enough While B12 tablets are widely available, they are not always effective for everyone
