How Often Should You Get B12 Injections? Gym goers spending monthly on vitamin B and C injections Have a f*cking word with yourself. Both are water soluble, so don't stick around for long in your system (12 14hrs) hence B12 Injection sites + How to use B12 Shots Safely B12 Shots Dosage for Adults: How Much, How Often, and Key Injection Guidelines Liv Hospital Vitamin B12 Injections Nu Private Clinic Mansfield aesthetics and beauty treatment clinic Benefits of Vitamin B12 The Health Suite Leicester B12 Injection