Vitamin B12 Injections Dosage and Frequency IVBoost How often should vitamin B12 injections be administered and how frequently should laboratory monitoring be performed? Main benefits of B12 injections 1) Increased energy & reduced fatigue B12 helps convert food into usable energy Deficiency often causes tiredness, weakness, and low stamina 2) Healthy red blood cells Prevents How Often Should You Get B12 Injections? Vitamin B12: How Frequently Should I Get It? URBAN Medical Fishersville, VA and Gilbert, AZ