B12 Injections vs Supplements: 16 Key Facts Explained B12 Injections vs. Oral Supplements: Which Is Better? Vitamin B12 injections for MTHFR: Injection or sublingual B12? Methyl Life Supplements B12 Injections vs Pills: Richmond's Complete Guide Benefits of a Vitamin B12 Injection, Vitamin B12 injections are commonly used for people who are deficient, struggle to absorb B12 from tablets, or require a faster and more effective boost., Helps Vitamin B 12 intramuscular injections are also used therapeutically to help restore energy and combat various symptoms related to such deficiencies. Vitamin B 12 is essential to the development of healthy blood cells, nerve