But only on one topic. Yes the FDA was created in large part from outrage over food condtions described in the book. But that really is only one chapter of the text, the majority of it deals with the exploration of workers in ALL sorts of industries (not just food), how preadatory home loans lead to finical ruins, how voting systems are rigged and how our policing system only produces more experienced criminals, not reform.
The last 2-3 chapters are explicitly socialist talking points that are still being said, for good reason, today. If the book was as influential as Sinclair wanted it to be, then we would've seen FAR FAR FAR more than the FDA.
I mean, heck, reread the passage I copied in. It's not really about food.