Food Quality, IIFYM and Strawmen: Do Food Choices Even Matter?

In All Articles, Blog Posts by Danny Lennon1 Comment

It’s Friday night and you’re just settling into relaxation mode for the weekend after a tough week at work.

You rock into the kitchen to rustle up something to eat. You’ve narrowed it down to two meals you enjoy. Now it’s decision time…

Sweet potato and coconut oil or ice cream?

What’s the best choice? (The fact you’re reading this blog I’m going to assume you care about health and body composition)

Does this seem like a ridiculous question? Do you think there’s one obvious choice? Or do you feel it doesn’t matter?

I don’t think we can answer the question without some further context.

Before we get into that though, I feel it’s important to take a brief re-cap on the driving factors of body composition from a dietary standpoint.

Hierarchy of Importance

Perhaps the best illustration of the relative importance of the different components of your diet (in my opinion) is the nutritional pyramid that Eric Helms laid out in his YouTube series:

Eric Helms' Nutritional Pyramid

Eric Helms’ Nutritional Pyramid

I’ve already addressed the calories-in/calories-out issue in detail in this post: Eat More Fat, Burn More Fat: Myth, Magic or Metabolic Advantage?

If you feel calories don’t matter, calories-in/calories-out (CICO) is a myth or carbohydrates can drive fat gain irrespective of overall caloric intake then PLEASE read that post in full

Do Food Choices Even Matter?

But when I bring up this hierarchy, then a common follow-up question is “well do the foods I eat even matter, as long as I get calories and macros right?”

And this is something that there’s plenty of online commentary on right now (at both ends of the yes/no spectrum of answers). Unfortunately, a lot it lacks the context that is should have and is primarily coming from people who you probably shouldn’t be getting your nutrition information from.

So let’s revisit our food choice conundrum we were left standing in the kitchen with…

Given the choice of eating some sweet potato lightly coated in coconut oil or some of Ben & Jerry’s cookie dough ice cream, what’s the best choice?

If we select adequate portion sizes, we can have the calorie and macronutrient content of either meal matching relatively closely:

Macro Comparisons Made Using Data From MyFitnessPal

Macro Comparisons Made Using Data From MyFitnessPal

Now we’ve already established the fact that energy balance is the main driver of body composition change, followed in second place by macronutrient composition. Haven’t we?

So if all other variables are held constant, what effect would selecting one of these meals over the other on any given occasion going to have?

In terms of affect on body composition, pretty much ZERO.

Even from a health perspective, this isolated substitution will mean virtually nothing either (if you excuse the 6 grams of fibre you’re missing out on and the slight difference in speed of digestion. But overall no big deal. Provided we’re not talking about someone with a clinical issue; say a diabetic or someone with lactose intolerance).

So yes, if you eat a diet comprised completely of “junk” food and keep within adequate daily calorie and macronutrient targets, you can lose weight. Whether that be Twinkies, Subway or McDonalds, energy balance still rules all.

BUT that doesn’t tell us the whole story from a practical perspective…

Because Here’s The Kicker…

Yes, the CICO/energy balance equation is undeniably completely correct. Eating in a caloric surplus leads to weight gain and eating in a caloric deficit generally leads to weight loss. (More more specific/accurate conclusions, READ THIS)

But it’s important that we insert some caveats to ensure this is not stretched beyond what is should be when we are discussing the concept of a good diet.

Calories are the main driver of body composition BUT unless you strictly track calories, food quality and food quantity are not completely independent of one another. Food quality has a significant impact on our ability to over-consume calories.

A diet that has a lot of hyperpalatable, calorie-dense, low satiety foods in it makes it highly likely that tracking calories will be necessary to maintain a caloric deficit (or calorie balance if maintenance is the goal). Or at the very least diligent, concious portion control.

So while calorie balance will still rule all, many dieters who embark on a route of eating more “real” whole foods find that calories don’t need to be counted.

Food choices should be based on many factors  outside of caloric content. And certainly you should not make food choices on calorie content alone.

We can circle back to the health implications but let’s persist with body composition goals for now.

Two Sides of the Same Coin

Trying to determine what exactly drives someone to overconsume is extremely difficult, simply because of the number of factors that can influence our food intake; habit, cost/ease of acquisition, boredom, stress, sleep deprivation, cues to eat, social situation and hyperpalatability.

And when you look at those things, you can see that we have plenty of factors that can cause us to eat even when we’re not hungry, our body doesn’t need the energy and there’s no in-built drive to eat.

In a previous post, How Do You Avoid Overeating (Without Counting Calories)?, I touched on some of these.

[Note: On next Tuesday’s podcast I’ll be talking with neurobiologist Stephan Guyenet and I’ll make sure to get into all of this in that episode]

One thing that cannot be denied is that our modern environment makes it ridiculously easy to overconsume calories. And our food choices are a part of that.

Perhaps one of the biggest errors is to trying to separate food quality and calorie content when asking what’s important for a successful way to eat.

Because doing so is treating them as independent variables.

And if you see them as unrelated factors then you ignore important issues like food reward, palatability, metabolic flexibility, intolerances, satiety and satiation.

So I believe food quality is absolutely crucial.

But want I DON’T believe is that we have to pick between eating clean and eating junk all day, despite how some people try to illustrate this.

I’ve been asked something along the lines of “if I just hit my calories and macros can I eat whatever I want?”

It’s a question I’ve  struggled to answer because the question itself is inherently flawed…

Food Quality, IIFYM & Strawmen

As I see it, the fact that we have some people saying “food quality doesn’t matter” and others saying “IIFYM means you can just eat junk all day long”, is ridiculous.

It shows a lack of understanding. In both cases it is someone making a straw man argument.

“A straw man is a common reference argument and is an informal fallacy based on false representation of an opponent’s argument. To be successful, a straw man argument requires that the audience be ignorant or uninformed of the original argument.” Wikipedia

 If someone is “pro-IIFYM” (I don’t even know how you’d term this) and boasts about just how much processed food they can fit into their macros, they clearly have no idea of why it is such a useful acronym. (And as an aside, if you tell people “I’m on the IIFYM diet”, you need a slap in the face).
Don’t take my word for it though. Alan Aragon gave an excellent clarification on this:


Similarly, if someone is “anti-IIFYM” and claims that it is terrible because it means you just eat junk all day long, then they fall into that same fallacy trap. They’re making the “oppopsing camp” out to be something ridiculous, to support their own “100% clean only” view.

Sure, as Alan Aragon mentioned in the above video, there are flexible dieters who push things to ridiculous extremes. But these are not the main proponents of flexible dieting that are respected in the field (think Aragon, Lyle McDonald, Layne Norton, etc.)

Another phrase that captures all this well would be Reductio ad absurdum. And like Sheldon I do NOT appreciate it.


Similarly Lyle McDonald calls it Excluding The Middle.

It’s all the same. Stop doing it.

Final Remarks

So I conclude three things from all this:

  1. Yes you can get leaner eating predominantly “junk” food
  2. But it makes things a hell of a lot more difficult
  3. Food quality exerts an important effect on long-term health (the presence of good body composition does not necessarily indicate good health, and vice versa)

And I didn’t even address any of the health-based points. So next week I’ll mention a few of those on an upcoming post comparing macronutrient breakdowns that can potentially exert different effects, even when each breakdown is matched for calories.

This post is available in audio format here:

Other posts you may like:


  1. Pingback: SNR #77: James Krieger – The Data Behind NEAT, Gluten & Reporting of Dietary Intake | Sigma Nutrition

Leave a Comment