We are epidemiologists and make a living studying everything that increases your risk of death. Focusing on the food you put into your mouth.
The hard science was done from 1940 to 1980 with the study of 7,500 healthy people over that time. Everything they put into their mouths or lungs where studied including the long term effects. This study is known as the Framingham Study.
It is this study that all the measurements that your doctor uses when he take your blood pressure blood and urine comes from. what is normal or what is not normal. All the meds you take that are keeping you alive are based upon this study.
Currently the science is being done to make those numbers of where normal is and where abnormal starts much more accurate with the long term study of 10 million people. My wife is one of the epidemiologists on this project. The number will soon be in your doctors office of what is normal by age and sex.
What has been proven since the 1950's is that a high fat diet will make you FAT and OBESE and sick. What has been proven since the 1950's is that a diet high in veges and fruit with some meat and complex carps is very healthy for you and what the people who live to be a hundred eat. And those people exercise. Notice that none of those old timers are FAT or OBESE.
The Clinton Crime Family and the TV want you as sick as possible so they can take over all of medicine in America and rule us all like the kings of old.