Peptide Therapy Joy Health and Wellness 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) Peptide Optimization Therapy for Washington, DC & Chevy Chase Center for Plastic Surgery The 'magic' pink injection., Injecting Vitamin B12, mixed with whatever maintence injection you choose (most commonly used with corticosteroids), is often used to combat muscle soreness, spasms, or