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Generally: A normal level of vitamin B12 in your bloodstream is 160-950 picograms per milliliter (pg/mL)
Zhu C, Li G, Lv Z, et al
when it receives an influx of a nutrient it cannot immediately use or store, it often attempts to clear it through the digestive tract or metabolic pathways, which is where most "too much" symptoms begin
Symptoms can include tiredness, lethargy, a sore mouth, being faint, and breathlessness
For someone whos been on a fair bit of medication throughout her pregnancy, its refreshing to not have to worry about any discomfort or unwanted side effects from something that provides all the essentials your body needs
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