In 1968, researchers ran the largest randomised trial ever done on saturated fat.
Over 9,000 people in Minnesota state hospitals were split between animal fat and corn oil for years.
The corn oil group’s cholesterol dropped hard.
The full results never got published.
The raw data sat on magnetic tapes in a basement for over forty years.
A researcher named Christopher Ramsden tracked those tapes down in 2013 and ran the numbers the original team never released.
For every 30 point drop in cholesterol, death risk rose 22 percent.
The lower the cholesterol fell, the faster people died.
In the over 65s, each drop of roughly half a point on the cholesterol scale carried a 35 percent higher death risk within two years.
The trial is real.
It was double blind.
It was the gold standard design.
And it found the exact opposite of what dietary guidelines were about to be built on.
It sat unpublished for over forty years while the low fat, high vegetable oil advice became national policy.
This was not a small study lost in the noise.
It was the largest of its kind.
And the finding that mattered most never reached a single doctor’s desk for four decades.