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Supplements are a fast-growing industry, but there's little evidence on effectiveness

NPR | By Sarah Gonzalez
Published August 7, 2026 at 3:41 AM CDT

Supplements are a $70 billion industry that's growing fast. But there's little evidence that many supplements actually do what they promise.

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Sarah Gonzalez
Sarah Gonzalez is a co-host and reporter with Planet Money, NPR's award-winning podcast that finds creative, entertaining ways to make sense of the big, complicated forces that move our economy.