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The Evolution of Diet
An anonymous reader writes Here's a story from National Geographic that looks at the historical diets of people from around the world and what that diet might look like in the future. From the article: "So far studies of foragers like the Tsimane, Arctic Inuit, and Hadza have found that these peoples traditionally didn't develop high blood pressure, atherosclerosis, or cardiovascular disease. 'A lot of people believe there is a discordance between what we eat today and what our ancestors evolved to eat,' says paleoanthropologist Peter Ungar of the University of Arkansas. The notion that we're trapped in Stone Age bodies in a fast-food world is driving the current craze for Paleolithic diets. The popularity of these so-called caveman or Stone Age diets is based on the idea that modern humans evolved to eat the way hunter-gatherers did during the Paleolithic—the period from about 2.6 million years ago to the start of the agricultural revolution—and that our genes haven't had enough time to adapt to farmed foods."
I think there is something to the "Paleolithic Diet" idea, but many people are Doing It Wrong.
The prehistoric people exercised all the time, every day. They ate meat when they could get it, which wasn't 100% of the time, and the meat they got was lean. They ate fruit when they could get it, which was almost never (e.g. berries in late summer, a few dried berries other parts of the year). They ate a variety of high-fiber roots, leaves, and other gatherable food. They didn't eat any processed carbs (white flour, white sugar, etc.).
If we lived more like that, we really would be healthier.
But some people take the idea to places I don't think are good. For example, making a "paleo cake" with no processed sugar sounds good, but if it has large amounts of ground nuts and cooked fruit, and is sweetened with maple syrup... it's really not something that the prehistoric people would have eaten and I'm dubious about the benefit.
Also, it is possible for people to adapt to changing conditions in a few generations; it's not necessarily true that evolution works so slowly that the diet from 10,000 years ago is still perfect for us. TFA talked about lactose tolerance in adults. In the cave-man days there was no evolutionary advantage to being able to consume dairy as an adult, but once people started keeping livestock and harvesting dairy, that changed. Now many people can digest lactose as adults.
TL;DR Eat lean protein, complex carbs rather than simple carbs, and get lots of exercise, and you will be healthy.
lf(1): it's like ls(1) but sorts filenames by extension, tersely
I think the most important aspect of caveman diet was the periods of thin, unsaturated blood of high dissolving power, called periods of starvation, once in a while, as far as cardiovascular disease goes. So instead of hitting the gym and starving your blood supply from nutrients by exercising too much, and wearing your body down with it, exercise only until you build and tone muscle without dragging the body through the starved mode, and for the starved mode artery cleaning simply starve, like don't eat nothing for 2 days at a time, once every 2 months or so. It's not that difficult or complicated, and it's cheaper than all that cardiovascular medication. In fact it's better if you do it monthly, or weekly, or daily. For instance, for a long time I had a habit of eating once a day, eating a whole lot, then not eating again for a whole day, and that allows for periods of blood thinness, as opposed to the habits of potato chip snackers, where it's not really the trans fat that kills - as even mother's milk has trans fat - but the constant snacking and keeping the blood saturated, to where temporary amorphous fat deposits get a chance to crystallize and become tough biofilm with the bacteria in blood, so they can no longer be redissolved. In fact garlic or heavy antibiotics might, might be able to break up biofilms but then you still have the relatively toughly crystallized cholesterol soap + fat cargo deposits, for which a good chest pounding or muscle pounding boxing match could loosen up. The questions are as simple as solubility in blood, biofilms, and mechanical shaking. Maybe they'll invent an ultrasound catheter they can stick down the arteries into a beating heart, and shake loose the crud, without an open heart surgery. But the issues are large fragments getting loose in the fat aorta, and getting stuck in the hair thin blood vessels of the brain and leg muscles, where the blood plumbing conduits are not so large.
Also, getting yourself very drunk to near death alcohol levels might help solubilize some of the cholesterol fat deposits easier during periods of starvation, but that has downsides to it too.