Epidemiological nutritional studies = healthy user bias. I recall reading someplace in the past about a vegetarian vs. meat eating epidemiological study someplace in Asia, Taiwan perhaps? No association between vegetarian diet and better health found like is in the U.S. Why? People were vegetarian for religious not health reasons. Americans tend to believe meat and saturated fat is bad so avoid it if trying to do numerous healthy things (that may actually be healthy things). The Asian people apparently had no such belief so no such finding. Interesting.