Paleo Diet Is Nonsense Sciencee

Moneybox
A blog about business and economics.
March 12 2013 4:30 PM

Paleo Diet Is Nonsense Science

paleo

Screenshot / ThePaleoDiet.Com

"Paleo" diet trends holding that the healthiest way to eat is to avoid the ground grain products that were unavailable to our pre-modern ancestors have grown enormously in popularity over the past few years. But Laura Miller, channeling evolutionary biologist Marlene Zuk, says it's total nonsense to think these products haven't been around long enough for our bodies to evolutionarily adapt to them:

The most persuasive argument Zuk marshals against such views has to do with the potential for relatively rapid evolution, major changes that can appear over a time as short as, or even shorter than, the 10,000 years Cordain scoffed at. There are plenty of examples of this in humans and other species. In one astonishing case, a type of cricket Zuk studied, when transplanted from its original habitat to Hawaii, became almost entirely silent in the course of a mere five years. (A parasitical fly used the insects’ sounds to locate hosts.) This was all the more remarkable because audible leg-rubbing was the crickets’ main way of attracting mates, literally the raison d’etre of male crickets. The Hawaiian crickets constitute “one of the fastest cases of evolution in the wild, taking not hundreds or thousands of generations, but a mere handful,” Zuk writes. Adjusted to human years, that amounts to “only a few centuries.”
There are human examples, as well, such as “lactase persistence” (the ability in adults to digest the sugar in cow’s milk), a trait possessed by about 35 percent of the world’s population — and growing, since the gene determining it is dominant. Geneticists estimate that this ability emerged anywhere from 2200 to 20,000 years ago, but since the habit of drinking cow’s milk presumably arose after cattle were domesticated around 7000 years ago, the more recent dates are the most likely. In a similar, if nondietary, example, “Blue eyes were virtually unknown as little as 6000 to 10,000 years ago,” while now they are quite common. A lot can change in 10,000 years.
Advertisement

Grinding and cooking grain is a practice that goes back perhaps as far as 30,000 years. By contrast, brussel sprouts appear to be just a few hundred years old and until the 16th century Native American populations were the only people eating tomatoes or hot peppers. None of which is to say that adopting a paleo diet won't "work." Any sufficiently stringent, somewhat arbitrary set of dietary restrictions is likely to lead you to snack less and be more mindful of what you're eating. But the paleo concept is a marketing gimmick that doesn't have much basis.

Matthew Yglesias is the executive editor of Vox and author of The Rent Is Too Damn High.

TODAY IN SLATE

Justice Ginsburg’s Crucial Dissent in the Texas Voter ID Case

The Jarring Experience of Watching White Americans Speak Frankly About Race

How Facebook’s New Feature Could Come in Handy During a Disaster

The Most Ingenious Teaching Device Ever Invented

Sprawl, Decadence, and Environmental Ruin in Nevada

View From Chicago

You Should Be Able to Sell Your Kidney

Or at least trade it for something.

Space: The Next Generation

An All-Female Mission to Mars

As a NASA guinea pig, I verified that women would be cheaper to launch than men.

Terrorism, Immigration, and Ebola Are Combining Into a Supercluster of Anxiety

The Legal Loophole That Allows Microsoft to Seize Assets and Shut Down Companies

  News & Politics
Jurisprudence
Oct. 19 2014 1:05 PM Dawn Patrol Justice Ruth Bader Ginsburg’s critically important 5 a.m. wake-up call on voting rights.
  Business
Business Insider
Oct. 19 2014 11:40 AM Pot-Infused Halloween Candy Is a Worry in Colorado
  Life
Outward
Oct. 17 2014 5:26 PM Judge Begrudgingly Strikes Down Wyoming’s Gay Marriage Ban
  Double X
The XX Factor
Oct. 17 2014 4:23 PM A Former FBI Agent On Why It’s So Hard to Prosecute Gamergate Trolls
  Slate Plus
Tv Club
Oct. 20 2014 7:15 AM The Slate Doctor Who Podcast: Episode 9 A spoiler-filled discussion of "Flatline."
  Arts
Behold
Oct. 19 2014 4:33 PM Building Family Relationships in and out of Juvenile Detention Centers
  Technology
Future Tense
Oct. 17 2014 6:05 PM There Is No Better Use For Drones Than Star Wars Reenactments
  Health & Science
Bad Astronomy
Oct. 20 2014 7:00 AM Gallery: The Red Planet and the Comet
  Sports
Sports Nut
Oct. 16 2014 2:03 PM Oh What a Relief It Is How the rise of the bullpen has changed baseball.