how long do b12 shot injections last for Shots Expire or Go Bad? Shelf Life & Storage · PA Relief How Quickly Does a B12

Final Thoughts vitamin B12 overdose is extremely rare , taking excessive amounts through supplements or injections may cause mild side effects in some individuals

There is no research showing that taking well over the recommended daily or weekly amount of B12 can be unsafe or detrimental to your health, and an official upper tolerable intake level has yet to be established

This update was just added to the above article but for those more focused on the comments I thought Id add it here too

10.1172/JCI106569 [DOI] [PMC free article] [PubMed] [Google Scholar] 19

Timeline The first participant in the study was enrolled in March 2017 and we plan to enrol for 2 years