The Revenge of Seed Oils

In the never-ending quest to figure out what we are supposed to eat, a new boogeyman has emerged: seed oils. Health and Human Services Secretary Robert F. Kennedy Jr. has pointed to seed oils—a category that includes common varieties such as canola, soybean, and corn—as a major culprit behind America’s chronic-disease problem. Kennedy is far from the only prominent seed-oil critic: On his podcast, Joe Rogan has declared that “seed oils are some of the some of the worst fucking things your body can consume.” These claims about the dangers of seed oils are not based in science; nutritionists believe that they are not only safe but also good for you in moderation. But that hasn’t stopped the charge against them from going mainstream. You can now find products labeled Seed oil safe at Whole Foods and Costco; according to one poll, 28 percent of Americans are actively avoiding seed oils.

So what are people eating instead? Kennedy’s preferred alternative is beef tallow, a nutritionally dubious choice. But most grocery stores...
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