What is the recommended frequency for monitoring Vitamin B12 levels in patients receiving intramuscular (IM) Vitamin B12 injections for replacement therapy? What are the benefits of B12 injection? Blades Wellness Vitamin B12 Injections and Their Benefits Vitamin B12 injections are a highly effective method of delivering vitamin B12 directly into the bloodstream. Vitamin B12 is an essential nutrient that plays a crucial Vitamin B12: Understanding Deficiency and Supplementation Diet vs Disease Benefits of B12 Injections for Optimal Health Should I start vitamin B12 (cobalamin) injections with a normal vitamin B12 level of 366 pg mL?