can b12 injections give you energy Injection Benefits: Energy, Mood, Metabolism How Fast Does B12 Injection
Description
Shortness of breath, heart palpitations, and dizziness may arise due to anemia caused by the deficiency

Fluorescent imaging for cancer therapy and cancer gene therapy

doi: 10.1016/S0140-6736(10)60888-4

However if your B12 is already borderline that could be enough reason for you to avoid it
Vitamin B3 assists in breaking down nutrients and releasing energy
