I've been telling people to avoid hydrogenated oils aka trans fats since 1981 when I first read about them. Professor Kummerow just died at 102.
"Dr. Willett, of Harvard, said trans fats had also been implicated in diabetes. In 2001, he co-wrote a paper showing a diet low in trans fats could help prevent Type 2 diabetes in women. “Heart disease was the tip of the iceberg,” he said.
Professor Kummerow was one of the first scientists to suggest that the saturated fat in butter, cheese and meats did not contribute to the clogging of arteries and was in fact beneficial in moderate amounts. This hypothesis, controversial at the time, was proved correct.
His own diet, he said, included red meat, whole milk and eggs scrambled in butter."
https://www.nytimes.com/2017/06/01/science/fred-kummerow-dead-biochemist-ban-trans-fatty-acids.html
