can glutathione bind with manganese in brain Frontiers Glial Perturbation in Metal Neurotoxicity:
Description
The administration of an oral dose of 25x the recommended daily intake of vitamin E in mice showed an increase in several inflammatory parameters in the kidney

125,126 Yu et al

Also, B12 injections can lead to allergic reactions in some people
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Convenient for self-injections or injections administered in outpatient settings
