Fun Fact Friday! Ever wondered Why is my B12 injection red? All B12s are cobalamins they have a cobalt atom at the center of a special ring shaped molecule called Why Do I Feel Worse After My B12 Injection Is it normal to feel tired after b12 injection? B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics Not All B12 Injections Are Equal: What to Know Before Your Appointment Timeless Wellbeing