B-Complex injections benefits include increased energy production, nervous system support, stress reduction, improved mood and cognitive function, cardiovascular health, support for red blood cell production, hair, skin, and nail health. Intramuscular (IM) injections for increased absorption. Ingredients - B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine)