Nutritional supplements are meant to complement a healthy diet, not replace it. If you're in good health and you eat a wide variety of foods, you likely don't need supplements.

But sometimes, fortified foods and dietary supplements may help provide one or more nutrients. For example, women who are pregnant or hoping to conceive are advised to take prenatal vitamins that contain folic acid.

Otherwise, a supplement might be recommended if you don't eat enough healthy foods or your diet isn't varied. Or you might need a supplement if you have a food allergy, intolerance, or condition that causes you to restrict certain foods or food groups. A healthy diet is especially key if you have a medical condition.

Talk with your healthcare team or a dietitian about whether supplements might be right for you. Be sure to ask about the possible side effects of any supplements you might try. Also ask if a supplement could affect any medicines you take.