Nature?s Field Vitamin B Complex contains the 8 B-vitamins; B-1 Thiamine, B-2 Riboflavin, B-3 Niacin, B-5 Pantothenic acid, B-6 Pyridoxine, B-7 Biotin, B-9 Folic acid, B-12 Cobalamin.? You can use it to treat or prevent vitamin deficiency due to poor diet, certain illnesses, alcoholism, or during pregnancy. B-vitamins play a vital role in maintaining good health and well-being. As the building blocks of a healthy body, B vitamins have a direct impact on your energy levels, brain function, and cell metabolism. The B-Vitamins complex helps prevent infections and helps support or promote cell health.