Esotera said:
High meat consumption correlates with increased risk of heart disease, obesity, and cancer. There are several studies that show this & it's pretty common knowledge.
Correlation doesn't equal causation. More importantly, many of the studies which come out showing a correlation either show a weak correlation, or completely fail to control other variables such as smoking, lack of exercise, alcohol consumption, or other carbohydrate consumption making their conclusions pretty much meaningless. Hell, the original study by Ancel Keyes which put forward the lipid hypothesis, the idea that consumption of dietary fat, particularly saturated fat, causes heart disease was bull when he originally put it out there. His original study which showed a correlation used data from 7 countries to show the relationship. But to get his data to show the trend between consumption of meat and heart disease he ignored the data from the rest of the 30 total countries that he had access to which showed no correlation at all and didn't include them in his study as it was published. Or we could look at T. Colin Campbell's The China Study which leveled blame squarely at meat consumption for things such as heart disease despite analysis of the very data he used showing the wheat flour consumption had a very strong correlation to heart disease while the correlation to meat consumption was substantially smaller. Something which he leaves entirely unexplored in favour of demonizing a food he doesn't agree with eating: http://rawfoodsos.com/2010/08/06/final-china-study-response-html/
In fact, the mechanisms by which people store fat and develop heart disease are pretty well understood at this point and they all rely on consumption of excess carbohydrates resulting in repeated spiking of blood glucose levels to trigger.
But I don't have all day to spend explaining the details. You can check out the movie Fathead, or some books such as Wheat Belly by Dr. William Davis, or pretty much anything by Gary Taubes to get you started on becoming more informed on the science that's out there. The tide is gradually, but very surely, moving away from the lipid hypothesis as an explanation for heart disease and fat consumption being responsible for obesity amongst the scientific community and even the general public. Believe it or not, common knowledge can, and very often is, completely wrong.
There isn't anything that I can think of that can't be replaced by a non-animal product though
It's very difficult to get enough dietary cholesterol (such as saturated fat) for things like proper brain development in children and brain function, immune function etc. And the funny thing is, you don't lower cholesterol by not eating it. The stuff is so essential to proper human functioning that if you don't eat it your liver will produce it 24/7 for years, and generally at a higher rate than you can eat it because without it you'll basically die. But your liver producing it isn't the ideal option and generally leads to an excess of small LDL particles and triglycerides, two of the major indicators of being at risk for developing heart disease. Small LDL particles are actually the type of cholesterol which will clog arteries damaged by inflammation due to repeated spikes in blood sugar. Eating meat and the saturated fat the comes with it actually lowers the amount of small LDL particles present in the blood stream.