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Long-Term Risks of Vitamin B12 Overdose Persistent skin issues Nervous system irritation Blood pressure changes Increased cardiovascular stress excessive supplementation without medical oversight
Learn where to self-administer a B12 shot and how to do it painlessly This article was medically reviewed by Shari Forschen, NP, MA and by wikiHow staff writer, Amber Crain
This makes it a highly targeted tool for metabolic research
It is harmless even in huge amounts: Ever since B12 was isolated as a substance, it has been used in extremely high doses to treat cyanide poisoning and a range of illnesses
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