Atkins cites scientific studies to back his anticancer keto claims. I think I remember that some of them were Swedish studies. Atkins had a book called "Dr. Atkins Health Revolution" that is now OOP that basically went through quite a few categories of modern health problems and talked about how keto diet can help with each of them. it was footnoted with scientific studies.
this book had a more rational tone than his "car salesman in plaid pants" aproach to writing his original diet book.