Americans spend billions of dollars on vitamins and supplements, but are they worth it? We look at the science behind some of the most popular supplements with nutritional epidemiologist Prof. Katherine Tucker, neuroscientist Dr. Simon Dyall, and medical researcher Dr. Mark Bolland.

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Credits: This episode has been produced by Wendy Zukerman, Heather Rogers, and Shruti Ravindran. Production assistance from Rose Rimler. Our senior producer is Kaitlyn Sawrey. Edited by Blythe Terrell with help from Alex Blumberg. Fact checking by Michelle Harris. Sound design by Martin Peralta and Bobby Lord. Music written by Bobby Lord. An extra thanks to the Zukerman Family, Joseph Lavelle Wilson, Chris Giliberti, Jasmine Romero, Matthew Nelson, Stevie Lane, Dr Harri Hemilä, Stephanie from the New York State Library and Dr Rajaprabhakaran Rajarethinam.

Selected Reading:The history of fortified foodsThe Institute of Medicine Report on calcium and Vitamin DSurvey on vitamin shopping habits in the USSimon’s paper on Omega 3 and spinal cord injuries in ratsMark’s work on calciumThis whopper of a study on multivitamins

Check out the full transcript here: http://bit.ly/2rlrpnZ

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