Types of injections explained! Understanding the angles: intramuscular (im) : injects deep into the muscle at 90. subcutaneous (sc) : goes under the skin at 45. intravenous (iv) : Vitamin B12 Monthly Injection Dose: Typical Dosages & Administration Methods Liv Hospital Not all shots are the same here's a guide Injections are a fast, effective way to deliver medications, nutrients, and vaccines directly into the bodybut not all injections are the VITAMIN B12 INJECTION 3000 mcg Treating Severe Vitamin B12 Deficiency B12 IM Injection B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn