Feeling exhausted no matter how much you sleep? Vitamin B12 deficiency is more common than people think affecting up to 15% of people. Treatment may include oral supplements or B12 injections. Save Still feeling tired even after good sleep? It might be more than just stress it could be Vitamin B12 deficiency., In Part 2, Dr. Pydi Satish, Consultant General Physician, explains the signs, causes, B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Vitamin B12 Shots in Canton, MI: What You Need to Know Feeling more tired, sluggish or low in mood? You're not alone shorter days and colder weather can leave your body needing that little bit of extra support. Vitamin B12 injections are