How Long Does a Vitamin B12 Injection Last? Skin Benefits & More Wow guys, you've been gate keeping!! Got my first B12 injection last week and it's like I am awake for the first time since having kids 20 years ago It's There are so many benefits of Vitamin B12 and you may be deficient and not even know it! Come in and try a B12 injection today to feel the difference What are the benefits of B12 injection? Blades Wellness Can Vitamin B12 Deficiency Indicate Cancer? Know Warning Signs