Health

I'm not a doctor, but there were some real problems with the initial studies.

That eating too much animal fat leads to high cholesterol that leads to damage to the heart and circulatory systems isn't supported by evidence. Cholesterol is actually used by the body to repair vessels and such.

When the initial studies were done on eating fat and heart disease, they failed to account for increased smoking.

Now, that most healthy people don't smoke, they have found the correlation is questionable.