Subcutaneous vs intramuscular what's the difference? #vitamintherapy #theb12store #injection 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) : How to Give a B12 Injection: Step By Step Instructions How to Give Yourself a Shot (SubQ) Olympia Pharmaceuticals What syringe volume and needle gauge and length are appropriate for intramuscular vitamin B12 (cobalamin) injection in an adult, and what is the recommended dosing regimen? Best Vitamin B12 Injection Sites: Where to Inject B12 PA Relief