B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve Can Vitamin B12 Deficiency Indicate Cancer? Know Warning Signs B12 Shots in Friso, Sherman, Anna. and Sunnyvale, TX B12 Shots for Weight Loss: What You Need to Know ISSA Vitamin b12 deficiency can cause several symptoms including, extreme tiredness, lack of energy, mental fog, and changes in mood and balance. Find out more about b12 deficiency and our private vitamin b12