Vitamin B Complex Folic Acid 5 mg mL Injection Multiple Dose Vial 10 mL Holistic Wellness with Copper Moon Vet B complex injections are a form of supplementation that provide a combination of several B vitamins in one shot. These injections typically include: Vitamin B1 (Thiamine) Vitamin B2 (Riboflavin) Vitamin B3 (Niacin) Two years later, adopting D'Artagnan was the best decision I've ever made Vitamin B1, B6 and Cyanocobalamin Injection Wexford Veterinary Regenerative Therapy in Cumming