AdvertisementAn ultra-processed diet made this doctor sick. Now he's studying whyPlay04:14Download AudioJuly 24, 2023Allison AubreyfacebookEmailDr. Chris van Tulleken took part in a month-long experiment. He ate 80% of his calories from ultra-processed food. He explains what happened in his new book, Ultra-Processed People. (Jonny Storey)
