can b12 injections make you nauseous Injections: Who Should Get Them and How Long Do They Last? Are There Drawbacks To Vitamin
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Long-term vegans are a special case, because B12 is one nutrient a plant diet cannot reliably supply

However, it's still important to follow your prescribed dosagemore isn't necessarily better, and using only what you need is both medically appropriate and cost-effective

doi:10.1016/S0076-6879(71)18006-8

Disclaimer: This product is strictly for laboratory research use only

Perhaps most notably, the researchers observed no adverse effects even at high doses