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 Vitamin B12 Injection When? Frequency, Benefits & Indications B12 Happy Hour B12 Vitamin Shots Santa Rosa, Sonoma, Mendocino The Naturopathic Integrative Medical Clinic of Santa Rosa How Often Should I Get B12 Shots? A Guide to Your Schedule B12 Shots Dosage for Adults: How Much, How Often, and Key Injection Guidelines Liv Hospital