The Side Effects of Taking Too Much Vitamin B12 Explained
                                
                                
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                                    4 min read                                
                            
                                While Vitamin B12 is a water-soluble vitamin and generally considered very safe, taking extremely high doses, particularly via injections, can lead to adverse side effects. The body is highly efficient at excreting unneeded amounts, but certain risks are still associated with taking too much Vitamin B12, which can be both mild and, in rare instances, more severe.