You raise a very valid point and this is somewhat of a new consensus that we need more fat, even according to orthodox paleo people like Loren Cordain and Robb Wolf. We tend to assume this very happy, harmonious, naturalistic view of paleo hunter-gatherer life and regard it as a wonderful time free of all of the degenerative disease we're seeing today. And it was free of those things. But nature isn't exactly pulling for us humans. The deer likes being lean and if we're hungry we like to eat the deer but just because the deer is lean doesn't mean the hunter-gatherer would rather the deer be lean. There is good evidence that a hunter-gatherer would prize mammoth over lean stuff. If it was the case that more protein than fat was available, that was just tough luck for Grok and he would have to eat more lean meat. Fat is fat and amino acids are amino acids and one happens to be deleterious in excess and one happens to be an awesome source of energy. Grok would eat the organs and extract the marrow and perhaps eat more protein if he was starving to death but it wasn't optimal. The types of foods that Grok ate were ideal for humans but the quantity and way in which they were consumed wasn't necessarily. Mark has some good posts regarding why more fat is better and makes the case they his dog will turn its nose up at a steak and go straight for the bone marrow
Here is a good article based on the Inuit. Turns out that the most metabolically advantageous macronutrient ratio for them is roughly 75% fat and 25% protein. http://www.nutritionandmetabolism.com/content/1/1/2
Grass-fed beef and bison is pretty darn close to wild quality food and so it is an expanding industry and lauded by paleo/primals. Robb Wolf was saying on his podcast that the grass-fed meat is too lean by itself so he buys extra fat and renders it. Kurt Harris loves butter and sees nothing wrong with it. There is a good reason why traditional Europeans add butter and lard to everything. i would much rather eat carbs like vegetables and tubers than exceed 25% protein, and that is what many paleo tribes did. It wasn't all purely meat. They would certainly favor the fat if they had access to it but that wasn't always how it turned out.
Last edited by Stabby; 06-30-2010 at 09:45 AM.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!