Now, while injectable B12 is generally very safe, it is important to be aware of potential side effects
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If you have diabetes, a thyroid disorder, take antacids, or smoke or drink too much, you may also be at risk of a B12 deficiency
Worldwide trends in body-mass index, underweight, overweight, and obesity from 1975 to 2016: A pooled analysis of 2416 population-based measurement studies in 1289 million children, adolescents, and adults (in Eng)
Injecting B12 into fat means placing the vitamin into the subcutaneous layer, the soft fatty tissue that sits between your skin and your muscle