Should You Use Sublingual B12 Over Capsules & Shots? 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 B12 Injections vs. Oral Supplements: Which Works Better? B12 Shot Advanced Skin Medspa NY Low Vitamin B12? Diet vs. InjectionsWhat Works Faster? How Can Vitamin B12 Shots Help Me Feel Refreshed Dr. Nasseri