Medically reviewed by Karina Tolentino, RD Key Takeaways B vitamins support energy production, brain health, and red blood cell formation. B12 is especially important for nerve health and people on ...

Energix-B (hepatitis B vaccine [recombinant]) can cause side effects, such as fatigue and injection-site soreness. If you are not able to tolerate Energix-B side effects, talk with your doctor or ...