Meet Weston A. Price of Neanderthin fame:

http://www.westonaprice.org/traditi...ary_wisdom.html

This is an excellent source website. The post on butter came from here. There is an interesting take on saturated fat vs polyunsaturated fat. Basically, due to polyunsaturated fat's tendency to go rancid, saturated fat is preferred. Learn why on this page entitled "Know Your Fats ":

http://www.westonaprice.org/know_yo..._your_fats.html

For complete listing of resources:

http://www.westonaprice.org