It's been building for decades in alternative health circles. There's legitimate science about them dating back to the late 80s/early 90s. In 1999 Sally Fallo

It's been building for decades in alternative health circles. There's legitimate science about them dating back to the late 80s/early 90s. In 1999 Sally Fallon published a book called Nourishing Traditions which argued for rejecting modern industrial foods. A lot of the arguments you see today about seed oils originate from this book. These got amplified in 2014 by Nina Teicholz who published a book called The Big Fat Surprise which made it the topic de jure of alternative health influencers. Then it's been a steady build across social media for about a decade.