Have you noticed the deluge of Paleo books flooding the market today? Do you know what Paleo nutrition is? Did our hunter/gatherer ancestors do more hunting than gathering? Were they hyper-carnivores? Did a large percent of their daily energy needs come from meat? Should we eat like that today?

Yes? No?

Maybe?

Holy mastodon, what are modern humans to do? It’s confusing. Here we are at the top of the food chain and we don’t know what to eat.

Channel your inner-caveman, grab a drumstick, and let’s unleash the past. On second thought, grab a bowl of baked beans or some goat yogurt, because I’m going to propose we’ve overestimated Paleolithic meat consumption and that, long term, the Paleo diet isn’t the best choice. For us, or for the planet.

But first, a disclaimer and a friendship flag. I’m no evolutionary biologist. I can’t tell you the historical time-lines of different populations, or even who the populations were. Neanderthals, sapiens, upper-lower-middle Paleolithic, pre-Neolithic?

Or who was where? Northern Europe, west Asia, the Mediterranean, sub-Saharan Africa, the Bronx?

In order to propose a specific behavior (archeologically speaking), you need to know what you’re talking about. You also need to have a sound understanding of historical perspective and some scientific evidence. Like cave drawings of ancient BBQs, stone-age meat cleavers, or a well-preserved Neanderthal clutching a mastodon femur. I don’t have any of the above. No artifacts, no fossils, very little knowledge of the time period.

I’m also of the notion that one-sized diet doesn’t fit all. Now or 200,000 years ago, so each to their own.

But, if we’re honest, our fragmented knowledge of the Paleolithic era doesn’t clearly indicate who ate what when. There’s a wide range of possibilities with a zillion variables. If we sift through the research, there’s evidence of fossilized plant particles and starch grains embedded in Neanderthal dental plaque, meaning they ate a variety of plants, including legumes and tubers. Ancient encampments are often littered with animal remains (bones), which gives the impression that early humans ate a lot of meat. But if you think about it, there’s not much evidence to leave behind if you’re a plant. Bones survive thousands of years, plants don’t — they decompose. It’s like searching for an ice cube after it melts. How do we know the Paleo diet wasn’t predominately plant-based, with a little meat thrown in on rare occasions? Recent research is suggesting that theory might be closer to fact than all the hoopla about the caveman diet.

My ancestors ate a plant-based diet, with a little meat when they happened upon fresh road kill, a slow rabbit, or whatever else was around during that time period. I doubt meat was a major source of energy. Since I can’t text my ancestors and ask, this is obviously speculation. For an older post I wrote on this and my thoughts on Paleo and how HLA DQ2 genes add to the mix, please read “Confessions of an HLA DQ2 Cave Woman.”

To make this information easier to “digest,” I’m simply going to compare the modern Paleo diet to what people who currently live the longest eat (Blue Zone communities, see below for details and references). Yes, you could say this is simplistic, misleading, and doesn’t do justice to the Paleo diet. I agree to some extent, but there are too many variables (individual biochemistry, unique gut ecology, genetics, lifestyle, outlook on life, activity levels, food quality, etc.) and not enough accurate historical information to give the Paleo diet a science-based thumbs up or thumbs down. Having said that, I’m not a fan.

Sample 1-day 2200 kcal Paleo menu (“The Nutritional Characteristics of a Contemporary Diet Based Upon Paleolithic Food Groups.” Loren Cordain, PhD, Department of Health and Exercise Science, Colorado State University, Fort Collins, Colorado)

Breakfast
Cantaloupe, broiled Atlantic salmon

Lunch
Vegetable salad with walnuts (shredded Romaine lettuce, sliced carrot, sliced cucumber, quartered tomatoes, lemon juice dressing, walnuts), broiled lean pork loin

Dinner
Vegetable avocado/almond salad (shredded mixed greens, tomato, avocado, slivered almonds, sliced red onion, lemon juice dressing), steamed broccoli, lean beef sirloin tip roast

Dessert
Strawberries

Snacks
Orange, carrot sticks, celery sticks

According to Loren Cordain, macronutrient percentages for a contemporary (2200 kcal) diet based on Paleo food groups (meats, seafood, nuts/seeds, fruits, vegetables) should be:
38 % Protein
23 % Carbohydrate
39% Fat
Food groups not included in Cordain’s version of the Paleo diet are: grains, dairy, dried beans, legumes

Sample 1 day 1900 kcal Blue Zone menu (this is an estimated compilation of several global Blue Zone diets, which are all similar in content)

Breakfast
Herbal tea with honey, corn bread, fruit, goat milk or yogurt

Lunch
Rice and beans, garlic, onions, large green salad

Dinner
Stir fried vegetables, sweet potatoes, spicy curries, red wine

Snacks
Vegetables, orange, nuts/seeds

According to Dan Buettner, longevity researcher and author of The Blue Zones: Lessons for Living Longer from the People Who’ve Lived the Longest, the typical food groups of Blue Zone inhabitants include: grains, legumes, vegetables, fruit, nuts/seeds, limited dairy (from local goats, for example), small amounts of meat or fish on rare occasions, red wine.

Although neither way of eating includes processed foods, junk food, or fast food, they are quite different in macronutrient composition. One is animal protein heavy (Paleo) and one is unrefined carbohydrate heavy (Blue Zone). Paleo doesn’t include grains or legumes, Blue Zone meals regularly include beans, corn, rice, lentils.

There’s a lot more to the longevity story than diet alone. I’ll focus on that another time, this post is about food alone.

So, what do you think? Paleo or plant-based?

Peace, love, and each to their own.
Melissa

References (aside from my own way of intuitive eating)

Blaser, Martin, et al. “What are the consequences of the disappearing human microbiota?” Nature: Reviews Microbiology, December, 2009.

Buettner, Dan. The Blue Zones: 9 Lessons for Living Longer from the People Who’ve Lived the Longest. National Geographic Society, Washington DC, 2012.

Cordain, Loren. “The Nutritional Characteristics of a Contemporary Diet Based on Paleolithic Food Groups.” JANA, Vol. 5, No. 3.

Diamond, Jared. Guns, Germs, and Steel: The Fates of Human Societies. W.W. Norton & Company, New York. 2005.

Hardy, Karen, et al. “Neanderthal medics? Evidence for food, cooking, and medicinal plants entrapped in dental calculus.” Naturwissenschaften Journal, Vol. 99, Issue 8.

Henry, Amanda, et al. “Microfossils in calculus demonstrate consumption of plants and cooked foods in Neanderthal diets.” PNAS, November 12, 2010. http://www.pnas.org/content/108/2/486.

Image credit: WikiMedia Commons