You're Still Obeying a Bureaucrat From 1993
Here's something that should make you uncomfortable: every time you glance at a nutrition label and think "that's 20% of my daily value," you're not making a health decision. You're running software written by the FDA thirty-odd years ago.
The number 2,000 didn't come from biology. It came from a room full of people who looked at the data, saw that Americans were reporting eating roughly 2,350 calories a day, and decided — explicitly, deliberately — to round it down. Not because the science said so. Because 2,000 is easier to remember than 2,350.
Richard Dawkins coined the word "meme" in The Selfish Gene (1976) to describe exactly this kind of thing: a unit of cultural transmission that spreads from brain to brain via imitation, regardless of whether it's actually good for us. Dan Dennett later called evolution "the single best idea anyone ever had." But the meme's-eye view is less flattering. It makes us look not like clever designers making rational choices, but like lumbering hosts carrying around ideas that want nothing more than to replicate themselves.
The 2,000-calorie recommendation is one of those memes. And it's been remarkably successful at doing exactly what memes do: spreading, persisting, and shaping everything we touch.
How the Number Actually Got Chosen
Let's go back to 1993. The USDA had just finished its dietary intake surveys, and the average American was reporting roughly 2,350 calories per day. Even that number was probably an underestimate — Redman et al. (2013) found that measured energy requirements in nonobese adults were higher than self-reported intake across the board.
So here's what the FDA could have done. They could have said: "Here's a range. Women need somewhere between 1,600 and 2,200 calories. Men, you're looking at 2,000 to 3,000." That's what the data actually supported.
They didn't do that. Instead, they picked 2,000 flat. Marion Nestle and Malcolm Nesheim put it plainly in Why Calories Count (2012): the FDA chose 2,000 because it was "easier to use" than 2,350 and therefore "a better tool for nutrition education."
Let that sink in.
The most widely cited calorie number on the planet wasn't chosen for accuracy. It was chosen because it was convenient.
And then they built an entire apparatus around that convenience. Nearly 900 pages of Federal Register notice about labelling regulations. Specific font sizes — calories must be in type no smaller than 8 point. Standard serving sizes worked out in enormous detail. The whole thing was labyrinthine from the start, and it's only gotten more so.
Four Reasons the Meme Won't Die
A meme survives when it finds ways to copy itself. Genes do this through reproduction. Memes do it through culture — and the 2,000-calorie meme has found four particularly effective routes to replication.
Environment: Building the World Around the Number
The moment the FDA committed to 2,000, they had to make that number visible everywhere. So they created an entire ecosystem of quantification.
Commercial food testing labs now generate macro- and micronutrient evaluations for products before they hit shelves. Smartphone apps combine basal metabolic rate estimates with heart-rate data into energy expenditure graphs. The nutritional facts panel — that familiar rectangle on every package — exists because someone decided 2,000 was the anchor number against which everything else should be measured.
This is what Blackmore (1999) calls cultural niche construction: the meme alters its environment in ways that make it more likely to be copied. The 2,000-calorie target claims global applicability, and that claim encourages the proliferation of technologies that measure, track, and reinforce it. Every calorie counter you've ever opened is a copy of the meme. Every time you check one, you're reproducing it.
Behaviour: The Meme Protects Itself Through Your Habits
Here's where it gets uncomfortable. The technologies I just described don't just measure us — they shape what we do.
We turn packets over. We compare brands by calorie count. We buy watches that promise the most accurate readings. We skip lunch before a dinner out because we've already "used up" our allowance. These aren't neutral actions. They're behaviours that the meme induces, and in inducing them, it protects itself.
Sue Blackmore explored this mechanism in The Meme Machine (1999): a meme is protected by the behaviours it creates. The 2,000-calorie meme uses our habits — turning labels, choosing the lower-calorie option, tracking intake — to create more iterations of itself in the world. More labels mean more people looking at labels. More trackers mean more people thinking about calories. The loop is self-reinforcing.
And as Troscianko notes, many of these behaviours tend in the direction of disordered eating. The meme doesn't care about that. It only cares about replication.
Identity: Becoming the Kind of Person Who Tracks
All these little behaviours accumulate into something bigger: identity.
We start to see ourselves as the kind of person who doesn't overeat. Who takes care of their body. Who cares about health in the measurable way that numbers allow. The primary guide for eating and movement has shifted — quietly, almost invisibly — from instinct to algorithm.
Troscianko reframes this power shift beautifully: it's moved from human experience to meme replicator power. We used to eat when we were hungry and stop when we were full. Now we eat according to a number that was chosen for its memorability, not its accuracy.
Counter-movements exist — intuitive eating emphasizes attunement to hunger and satiety signals, for instance. But they're not mainstream. The memes have us far more profoundly than even twenty years ago, let alone two hundred.
Cognitive Bias: Why We Trust the Number Anyway
Here's the part where we're wired to be defenceless.
Human minds confuse precision with accuracy. This is what Troscianko calls "precision bias": a more specific number feels more correct, even when it isn't. So when your watch tells you you've burned 2,689 calories today, you trust it. The specificity sells the accuracy.
This is the paradoxical flipside of why 2,000 works in the first place. We like round numbers for our rules — they're memorable, simple, easy to share. But we like un-round numbers for our measurements — they feel precise, scientific, trustworthy.
The FDA rejected the range precisely because it "sounds like there's less conviction behind it." A range implies uncertainty. 2,000 flat sounds like certainty. And our cognitive wiring hands that certainty a free pass.
But here's the thing: both are inaccurate at their core. The round number for rules and the un-round number for measuring — neither one actually reflects your body's true energy needs. Remembering that, precision aside, inaccuracy is at the heart of both, might be one way to reduce the unhelpful power they have over us.
So What Now?
I'm not asking you to throw out your fitness tracker. I'm not saying ignore nutrition.
I'm asking you to ask one question every time you see that number:
Who picked this? And why?
Was it science?
Or was it convenience?
Because if you believe 2,000 calories is the right number for you — then you're not eating for your body. You're still obeying a bureaucrat from 1993.
And that's not health. That's a meme.