iStock/ThinkstockBy DR. JENNIFER ASHTON, ABC News Senior Medical Contributor

As we hear more and more about studies that suggest that daily multivitamins may not be all they’re cracked up to be, this has not stopped Americans from buying single supplements such as fish oil.

So what supplements may you need and which could you skip? Well, certain groups of people should take vitamin supplements. This includes pregnant women, women who may become pregnant, people who take acid-blocking medications or who have had weight loss surgery. They generally need vitamin supplements.

Otherwise ABC News Senior Medical Contributor Dr. Jennifer Ashton recommends getting vitamins and minerals from your food in the form of my favorite superfoods: eggs, avocados, berries, and fish. And don’t forget, it’s not just about what you eat, but how you move. Fitness matters.

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