vitamin b12 injection for stress and fatigue B12 Injections | Boost Energy
Description
Vitamin B12, meanwhile, is essential for nerve function, red blood cell formation, and DNA synthesis

Rarely reported symptoms may include mild skin reactions, gastrointestinal disturbance, or headache, typically following high-dose intramuscular injections

For example, taking it with food might help with stomach issues

doi:10.21037/cdt-20-528 Kearon C, Kahn SR

It also assists the body in wound healing so if you suffer a stroke or have damage to your brain, it can support your recovery
Other lipotropic injection side effects include: Headaches and light headedness Stomach upsets such as mild nausea and mild diarrhea Allergic reactions (itching, hives, shortness of breath, wheezing, swelling of the tongue, throat, or mouth) although rare, can also occur