B vitamins are a gaggle of nutrients that play many important roles in your body.Most people get the recommended amounts of those vitamins through diet alone since they\'re found during a big variety of foods.However, factors like age, pregnancy, dietary choices, medical conditions, genetics, medication and alcohol use increase the body’s demand for B vitamins.In these circumstances, supplementing with B vitamins could also be necessary.Nutritional supplements that contain all eight B vitamins are mentioned as B-complex vitamins.Here are the health benefits of B-complex vitamins also as dosage recommendations and potential side effects.