The best way to get enough vitamins is through food. Eating recommended amounts from the Food Guide Pyramid – grains, vegetables, fruit, dairy, meat, and fats/sugars – promotes good health and high energy. Recommended Dietary Allowances (RDAs) are gender and age specific, geared toward children, adults, males, non-pregnant females, and pregnant females. Many Americans rely on nutritional supplements to get enough vitamins and minerals. A recent study published in the Archives of Internal Medicine reports nearly half of all adult Americans take supplements. Those who may benefit from supplements include people on a doctor-prescribed very low-calorie diet, the elderly, strict vegetarians, lactose-intolerant individuals who cannot drink milk or eat dairy products, and women of child-bearing age who need folate.
P.S. Because excess amounts of certain supplements can be toxic, always check with a doctor before taking them.