We’ve been told that foods like butter and bacon are bad for us — because they're packed with saturated fats. And top dogs in nutrition say that a better option is vegetable oil, like canola oil. But there’s a trend popping off claiming that these top dogs are barking up the wrong tree. They say that butter is better and that those vegetable oils, aka “seed oils,” are incredibly dangerous. So — who’s right? Is canola oil really killing us? Or is butter the bad boy?

To find out, we speak to author and physician Dr Cate Shanahan, professor of nutrition science Jason Wu, professor of endocrinology David Schade, and Dr David Iggman.

Find our transcript here: https://bit.ly/ScienceVsSeedOils 

A new Season of Heavyweight is out now! Find them here: https://gimletmedia.com/shows/heavyweight 

In this episode, we cover:
(00:00) Seed oils are the devil
(05:35) Is saturated fat killing you?
(12:25) Does cholesterol cause heart attacks? 
(22:02) Do seed oils cause inflammation?
(28:00) Are seed oils killing you?

This episode was produced by Wendy Zukerman, with help from Joel Werner, Rose Rimler, Nick DelRose and Michelle Dang. We’re edited by Blythe Terrell. Fact checking by Carmen Drahl. Mix and sound design by Bumi Hidaka. Music written by Bobby Lord, Emma Munger, Peter Leonard, and Bumi Hidaka. Thanks to all the researchers we spoke to including Dr Lorena Pacheco, Dr Qi Sun, Dr Tetsumori Yamashima, Dr Idrees Mughal, Professor Rashika Ahmed, Dr Hatem Tallima, Dr Heidi Silver, Professor Ronald Krauss, Dr Yutang Wang, Dr David Sullivan, Professor Peter Clifton, Dr Lee Hooper and others. And a big thank you to Morgen Rockel, the Zukerman Family and Joseph Lavelle Wilson.

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