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. Vitamin b1, b6, and b12 Injection: The Complete FAQ Guide In 2025 AIPAK ENGINEERING Top 5 Vitamin Injections & Their Uses These injections help treat vitamin deficiencies and support overall health. 1 Vitamin B12 Injection Helps in nerve weakness & deficiency 2 Vitamin D3 Injection Cyanocobalamin (B12) Injection 1000 mcg mL, Multiple Dose Vial 30 mL McGuff B VITAMINS B1+B6+B12 (SHERVIT B) IM IV Sahar Pharma Vitamin B12 Injection Manufacturer AdvaCare Pharma