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What happens when you start taking B12

While there is no exact definition for B12 levels, a normal B12 serum test level is considered around 300-900pg/mL, while deficiency is less than 200 pg/mL

In response, your heart kicks into overdrive, beating faster and harder to push what little oxygen is available through your bloodstream

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The information in our articles is NOT intended to replace a one-on-one relationship with a qualified health care professional and is not intended as medical advice

Adachi S, Kawamoto T, Otsuka M et al (2000) Enteral vitamin B 12 supplements reverse postgastrectomy B 12 deficiency Bensky MJ, Ayalon-Dangur I, Ayalon-Dangur R et al (2019) comparison of sublingual vs