http://www.bmj.com/content/353/bmj.i1246
Researchers recovered data from a study of nearly 10,000 subjects who were randomly chosen to receive either a control diet high in saturated fat from animal sources, or an intervention diet replacing saturated fat with vegetable oils, in an effort to lower serum cholesterol.
The data show that the intervention diet did, in fact, lower serum cholesterol, but that this did not lead to improved outcomes…in fact, the lower the serum cholesterol of the participants, the higher the risk of mortality.
40 years went by…how many lives would’ve been saved if this data had been made widely available earlier?