Did you know there are actually eight B vitamins? B vitamins play key roles in cellular health, from making new red blood cells to helping nerve cells function properly. We consume B vitamins in our diet with foods such as fish, poultry, dairy, vegetables, and fortified foods. In some cases, not getting enough B vitamins can lead to negative health effects, such as anemia. Learn about B vitamin toxicity, deficiency, benefits, and more in these articles written by experts. Plus, find out more about our vitamins and supplements.