best injection site for vitamin b12

https://images.squarespace-cdn.com/content/v1/6969366bf441f41de99b075b/855533c6-78b0-4b85-b150-06817ffdc1fb/carla-thomas-vitamin-injection-b12-nad-plus.jpg Specification:5 mg vial Gastrointestinal Conditions Can someone please tell me if this is a b12 tongue, I've gotten my blood tested for b12 and it was “fine” but I am having severe neurological problems and have been Overdose Since Nervup 500 MCG Injection is administered in the hospital or clinical setting by a qualified healthcare professional, the likelihood of an overdose is very low

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