What Happens If You Inject B12 Wrong: 6 Red Flags B12 vs Lipo B12 Injections Invigor Medical Vitamin B12 Side Effects: How Much is Too Much? ivconcierge.com VITAMIN B12: Overview of Its Importance Why Do I Feel Worse After My B12 Injection? Causes & Management Bolt Pharmacy Vitamin B12 (cobalamin) and folate (vitamin B9) are vitamins that serve important functions in the human body. Folate is needed for development and growth of cells (including red blood cells) and synthesis