Vitamin B12 Shots for Ultimate Rejuvenation in Catonsville MD 9 Best Vitamin B12 Supplements The Advantages of B12 Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine A vitamin B12 injection is a shot that delivers B12 directly into your muscle, helping your body absorb it quickly (especially if your body struggles to absorb it from food or tablets) Curious about B12 shots? The Wellness Center Vitamin B12 Injections B12 Shots Palm Springs & Corona, CA