Federal regulations state that companies are responsible for having evidence that their dietary supplements are safe and for ensuring that product labels are truthful and not misleading.Some products marketed as dietary supplements-promoted mainly for weight loss, sexual enhancement, and bodybuilding-may contain prescription drugs not allowed in dietary supplements or other ingredients not listed on the label.Many dietary supplements haven’t been tested in pregnant women, nursing mothers, or children.Dietary supplements may interact with your medications or pose risks if you have certain medical problems or are going to have surgery.Taking a multivitamin is unlikely to pose any health risks.What do we know about the safety of dietary supplements? Most research shows that taking multivitamins doesn’t result in living longer, slowing cognitive decline, or lowering the chance of getting cancer, heart disease, or diabetes.Supplements you buy from stores or online may differ in important ways from products tested in studies.Studies have found that some dietary supplements may have some benefit, such as melatonin for jet lag, and others may have little or no benefit, such as ginkgo for dementia.What do we know about the effectiveness of dietary supplements? The amount of scientific evidence we have on dietary supplements varies widely-we have a lot of information on some and very little on others. How much do we know about dietary supplements?
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