[UPDATE: Merged with other duplicate question.]
It's really a manufactured controversy. No anthropologically sophisticated Paleo is going to claim that humans never ate grains; the anthropological evidence to the effect that we'll eat anything, especially when desperate, even foods like grains which are a bitch to harvest and process in their wild form and which have suboptimally high levels of certain antinutrients, is pretty incontrovertible. So this really is completely unsurprising.
The only surprising thing, really, is the inaccuracy and spin of the reporting.
This doesn't really change things for me. It's not even really news: we even have genetic adaptations to starch that occurred a very long time ago and this same evidence has been presented before. It isn't like this is barley or something. It's cattail and fern, which I've eaten myself. Either way, the study leaves much to the err...imagination. "Poor state of preservation" is used by the paper several times.
Also "grains" is really really inaccurate. It was starch that they were grinding mainly. Cattail roots are not a grain. Of the nine plants mentioned in the paper, only one could count as a grain (they list it as a seed). The rest are roots and rhizomes.
The bone isotope studies are way more convincing and show that the diet of upper paleolithic humans was high in protein. Have some cattail pancakes with your steak if it makes you feel better though. I was eating some chestnuts today and they are very similar nutritionally.
Why is this surprising? We were hunter-gatherers. If starch is available, why wouldn't it have been consumed when meat was not forthcoming? Most plant matter containing starch needs to be prepared (i.e., broken cell-walls) before eating, and grinding up a plant and/or making a flour helps accomplish just that. It's not as if they were cultivating grain and eating massive amounts of wheat flour and sugar.
Pretty misleading the way its written tho.
Flour in the title = fern flour and cat tail flour.
"New findings indicate grains" but none of findings described are grains.
The crux of the argument that they must have eaten grains is the researchers saying... 'But "a large number of plant families are likely to have been involved in the diet," the researchers said.'
That's what we call an assumption.
Hmmm, grain proponents will of course be using this horrible article for debunking paleo. :(
I see it in the same light as the fact that our paleolithic ancestors ate honey and fruit.
It was either infrequent, seasonal, or extremely labor intensive.
My ancestors came across a beehive once every couple of months, used copious amounts of energy to climb up the tree and sprinted as fast as they could to avoid stings. This is NOT the same as my going to the store and getting a little honeybear, and no excuse to eat it every day.
My ancestors ate fruit, which they foraged or climbed trees for. They probably burned off all the carbs from the fruit by the time they were done foraging. Further, this was seasonal and the fruit was not the super sweet product it is today.
As far as the wheat is concerned, I am sure it was as labor intensive, if not more than fruit, as aside from the foraging, they also had to process it. This is not the same as us eating bread.
The fact that our ancestors SOMETIMES supplemented their diet with fruit, honey, and wheat does not mean that these are the optimal things for us to eat or that the current manifestations of these products really resemble what they consumed. We also need to take into account what it took in order for them to gain access to these foods.
There is also the point that our ancestors never grew up on a corn flakes, white bread, snickers bars, Hawaiian Punch, and Little Debbie snacks. Their metabolisms were not deranged. Ours probably are. They could do with extra calories and fructose and wheat once in a while due to the fact that food was usually scarce. This is not our case.
So, I say it doesn't really matter. Meat and vegetables (with some nuts and fruits sprinkled in there) really are the best for us. We should follow the rules, not the exceptions to the rules.
(Plus, if you mimic your ancestors and go binge on honey once a year, might as well make it something delicious like Nutella. But I digress :)
If memory serves, the earliest evidence of grain use goes back 84,000 years or so; somebody found some grinding stones with millet residue.
Given the difficulties in using grains without agriculture, I doubt that regardless of when it started grain use would have been a major part of anybody's diet until they actually started farming the stuff, at which point all our troubles began.
Also, modern grains are very different from their wild precursors, having undergone several millenia of artificial selection. So nutritionally, this doesn't exactly support scarfing down the cupcakes.
Overall, I'm unsurprised by this article; it doesn't tell us anything new.
Thought everyone would find this amusing, from the "Discussion and Conclusions" section of the paper:
European Paleolithic populations are generally considered to have been predominantly carnivorous, because the evidence for plant subsistence is limited. However, ethnographic analogy and nutritional studies stress the need for a high percentage of nonprotein macronutrients (which can include plant foods) to integrate the diet. We are now able to add evidence for plant food processing, on the basis of the recovery of flour residues on coarse (heavy-duty) tools across Europe up to 30,000 y ago [...]
From our perspective this is hilariously circular: " 'nutritional studies' have shown that we need a 'high percentage' of carbohydrate [I assume the authors know that animals also provide fat]. So it's a good thing that this study has confirmed what we already know." Good work.
well, i am shocked i have to say. 30,000 years ago and eating some kind of ground starch is not what i have come to think of as a piece of history. We learn more every day though.
I guess on one hand i would caution to learn more precisely about what was being ground with the discovered morter and pestles. There may be some evidence of a grain but it may be that the tools were used for something else primarily, like mentioned briefly in the article (fern starch, etc).
Also, along the Kurt Harris lines, let us focus on the the paleolithic milieu, ie metabolism of those healthier people and how they maintained them and what we can do today to bring about a similar experience. Rather than simply eating what our evidence suggests they ate.
"Many researchers had assumed people living in Europe thousands of years ago ate mainly meat because of bones left behind, and little evidence of plant food."
This goes directly against what many vegan "experts" have been telling me! :p
I think it's interesting. I know they're talking about roots, but to play devil's advocate, aren't grains simply domesticated forms of wild grass seeds? I see tall wild grass growing everywhere, I'm sure it grows all over the planet. First it may have started as eating a few grass seeds, then later they ground it into a flour and kneaded it into a dough.
I'm not sure it's rational to look at history and think, oh one day 12,000 years ago on a fateful morning New Year's Day 10,000 BC, Grok Jr. had an idea to plant a wheat farm and the rest is history. There has to be something further back related to grains and their use as food by humans.
Grains still may not be paleo, but that doesn't mean they had no place in the Paleolithic. Even if it seems like a footnote compared to the main staples of the human diet then.
The main question to answer with grains is not "Were grains ever eaten in Paleolithic times?" but "Are we adapted to their use as food? Are they healthy for us? What are the consequences or benefits of eating them?".
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