moda0306 wrote:While we may have been eating meat for the last several thousand years, that's a pretty small piece of our evolution.
Moda, where did you get the idea that meat-eating humans have been around for only the "last several thousand years"? That's incorrect. Our paleolithic ancestors have been eating meat for over 2 million years.
See:
http://en.wikipedia.org/wiki/Hunter-gatherer
moda0306 wrote:Most carnivores have very simple digestive systems (think crocodiles), but ours are much more complex.
Moda, you have it backwards. Herbivores use fermentation to digest plant cellulose — which is far more complex. We do not. Ruminant herbivores have four stomachs to break down cellulose — done through various bacterial and regurgitation actions. I would argue that four stomachs is very complex. Non-ruminant herbivores (the kind you are referring to) pass quite a lot of undigested food out of their bodies. They have to spend about three quarters of the day feeding and rely on fermentation to digest plants. So, no, we are not related to those kinds of herbivores either. Our digestive system is most similar to that of a dog — which is designed to be carnivorous.
If nothing else, the presence of a gall bladder in our bodies should be a signal that we are literally designed to digest natural fat. Not to mention our "canine" teeth and sharp incisors to tear meat.
moda0306 wrote:and we are descendents of herbivores.
Not directly.
Homo erectus was meat eating. According to the Smithsonian Institution...
The tall bodies and large brains of Homo erectus individuals required a lot of energy on a regular basis to function. Eating meat and other types of protein that could be quickly digested made it possible to absorb nutrients with a shorter digestive tract, making more energy available faster. There is also speculation that honey and underground tubers may have been significant food sources for Homo erectus.
Source:
http://humanorigins.si.edu/evidence/hum ... mo-erectus
Even Homo habilis — from 2.6 million years ago — specialized in meat eating.
Another line of evidence for the diet of H. habilis comes from some of the earliest cut- and percussion-marked bones, found back to 2.6 million years ago. Scientists usually associate these traces of butchery of large animals, direct evidence of meat and marrow eating, with the earliest appearance of the genus Homo, including H. habilis
Source:
http://humanorigins.si.edu/evidence/hum ... mo-habilis
Furthermore, the microwear of Australopithecus dental fossils — from between 2 to 4 million years ago — show that Australopithecus ate tougher foods. And the strontium/calcium ratios in Australopithecus fossils indicate that they may have eaten animal foods, when available. The "canine" teeth present in
Australopithecus afarensis fossils also indicate the potential for meat eating.
According to the Smithsonian Institution...
There is also evidence that early humans first migrated out of Africa to follow animal migrations, for hunting.
moda0306 wrote:I don't know when along the evolutionary scale we started eating meat, but I'm quite sure there were a lot more years that our "ancestors" were eating veggies than meat, and I'm not sure which should have more weight, given the thousands of years of recency of our meat-heavy diets.
Your facts are all off. Our ancestors have been eating meat for at least 2.6 million years — and probably scavenged some meat as far back as 4 million years ago, when their ancestor brains were the size of chimpanzees. We
evolved to eat meat and fat by growing a gall bladder and meat-tearing teeth. The very fact that we evolved with those features proves that we evolved to eat meat. We are truly omnivores.
moda0306 wrote:I don't know if it's skepticism or confusion that guides me, but I tend to think a diet of vegetables, lean meats, and enough fruit to get whatever vitamins and minerals we need, along with plenty of exercize of both cardio and weight training, would probably be the best.
Not even 200 years ago lean meat would have been considered foolish if fatty meat was available. And it's actually very difficult to obtain lots of vitamins from fruit and vegetables without proper preparations. Our bodies can't break down the cellulose to unlock those vitamins. You would need to ferment those foods in some way (or have the correct bacteria in your gut) to break down cellulose.
A million years ago, our ancestors celebrated the kills of wooly mammoths and savored every morsel of the animal. It would have been ridiculous to throw away the fatty parts of the animal. In fact, the "lean" muscle meat is the least nutritious part of the animal (the fat soluble vitamins are stored in the fat and the organ meat)!
moda0306 wrote:I have a really hard time believing that steak, bacon, and eggs every day is really any better than pasta and pepsi, but I really feel like I'm in "pre-Permanent-Portfolio-ville" when it comes to dieting. So much noise and I haven't hit on anything that really makes sense and I can get behind.
Eggs have sustained human life for millions of years. Bacon fat (i.e. lard) contains a good amount of Vitamin D — which is essential to human nutrition. You can't get vitamin D from pasta and pepsi.
moda0306 wrote:Then again I respect the hell out of your opinion so if you'd be so kind as to toss out your ideal diet (not that you haven't somewhere else on this board) I'd be grateful.
My "ideal" diet (and I'm still learning) is a traditional diet. It's a mixed and balanced diet with plenty of access to natural animal fats. So...plenty of traditionally-cooked vegetables (preferably lacto-fermented to unlock nutrients and disable anti-nutrients). I don't do very much vegetable lacto-fermentation right now, but that would be ideal. Plenty of pastured animal fats, which are rich in vitamins and co-factors. Also, you are more likely to absorb fat soluble vitamins A, D, K, and E in the presence of natural animal fat. (In other words, add pastured butter to your vegetables to assist with vitamin absorption.) Raw whole dairy, butter and yogurt. Pastured eggs. Avoid refined sugar and refined grains. When eating grains, prepare them in a traditional manner to disable the anti-nutrients (soaking, fermentation). Basically, traditional nourishing foods that have had a long track record of success around the world for centuries. There's nothing "fad" about that.
moda0306 wrote:Of particular interest:
- Green Tea
Not sure. Probably good, but maybe too much fluoride in your body if you drink this too often.
moda0306 wrote:- Protein powder shakes with frozen fruit (love these, plus it's the only way to get me to eat a lot of fruit on the cheap)
Bad. The proteins are often fragile and are damaged by processing into powder form. It's not a natural food that our ancestors ever ate. That's for sure. All of the naturally occurring co-factors are missing. Plus, eating lots of ground up fruit probably isn't good. All the fiber is shredded and your mouth never gets to pre-digest them with enzymes. So, you just end up pouring more fructose directly into your stomach than you would ordinarily eat. Not good. It's better to chew fruit — secreting digestive enzymes and sending signals to your stomach and brain on how much to consume.
moda0306 wrote:- Lean vs fatty meat
Lean meat isn't very nutritious. Fatty meat is far more nutritious, so long as the meat came from a pastured animal. If you were a hunter gatherer a million years ago, you would have been very disappointed if you killed a lean animal. You would have gotten far more nutrition from a fatty animal. That's why wooly mammoths and other fatty animals were targeted by early humans (rather than frogs and pigeons). They obtained more energy and vitamins from fatty animals.
moda0306 wrote:- Weight training vs cardio
Both have their advantages. It probably depends on your genetic makeup (fast-twitch, slow-twitch, etc.).
Again, I'm still learning, but this is what my
historical research has shown so far.