There have been native peoples all over the world who lived primarily and sometimes exclusively on animal flesh and animal fat — the Masai tribes, our own buffalo-hunting tribes, the Inuits, etc. — but heart disease was nearly non-existent among those people. Doctors who visited them were stunned at how healthy they were. The buffalo-hunting tribes didn’t become fat, diabetic, and plagued with heart disease until they stopped hunting and started living on sugar and flour.
A century ago, Americans consumed four times as much butter and lard as we do now, but again, heart disease was quite rare. We didn’t see a surge in heart disease until we began eating a lot more sugar and substituting processed vegetable oils for animal fats. Even today, the French and Swiss consume far more cream, butter, cheese and pork than Americans, but have a much lower rate of heart disease. (They do, however, consume far less sugar, soda, processed vegetable oils, and white flour.)
Clearly something other than animal fat causes heart disease — my guess is sugar and refined carbohydrates, because that result does hold up. Go around the world, look at different cultures throughout time, and you’ll see that heart disease, cancer, and other “diseases of civilization” show up shortly after sugar and white flour become dietary staples.
