Vitamin B12 injections deliver high doses of this essential vitamin directly into your bloodstream for better absorption than oral supplements to boost energy, support red blood cell production and maintain nerve function. The 5 best vitamin B12 supplements for 2026, according to dietitians Curious about B12 shots? The Wellness Center Vitamin B12 Injection: How It Helps , What It Is, Vitamin B12 injections help correct deficiencies, support nerve health, and boost energyespecially in people with poor absorption or higher body B12 Injections vs Pills Baltimore: Which Works?