b12 injections upset stomach Shots Side Effects And How To Treat Them Vitamin B12 Injections
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Vitamin B12 deficiency during pregnancy can cause serious developmental problems in children

Zhang Y, Xu M, Xia M, Li X, Boini KM, Wang M, et al
Vitamin B12 is required for normal cell function, so a deficiency over a long period of time may impact growth, digestion, blood cell production, and the nervous system

"DNA methylation, insulin resistance, and blood pressure in offspring determined by maternal periconceptional B vitamin and methionine status"
Serum vitamin B12 is the most common way to measure your vitamin B12 status (11)
