> A medical report issued by the New York medical examiner's office a year after his death showed that Atkins had a history of heart attack, congestive heart failure and hypertension.[10][12] His widow refused to allow an autopsy

https://en.wikipedia.org/wiki/Robert_Atkins_(physician)

My point was mainly that there have been out-of-the-mainstream doctors advocating for this diet for 3 decades. They continue to be out-of-the-mainstream.