Injecting substances can expose individuals that use injection drugs to serious harm, but understanding the difference between safer and more harmful sites can help reduce these potential dangers. Here's a breakdown of Methylcobalamin 10,000mcg injectable, 10mL (lyophilized) Defy Medical B12 Injections CryoBody Sutton Coldfield Birmingham B 12 (Methylcobalamin) Therapy MedClub by Dr Jenn How To Give A Subcutaneous Injection And Sites The HCG Institute