Many of us have heard the phrase “All Foods Fit.” I’ll often see this sentiment pop up in an Instagram post, depicting a slice of pizza next to a salad with a heart emoji. And as a Registered Dietitian supporting clients across Alberta and British Columbia, I often hear how this phrase can feel deeply confusing, and even like a trap!
For my clients who have spent years tracking every morsel of food, this feels like an invitation to completely lose control. For the parents I coach who are navigating eating disorder recovery, it feels like a lack of a plan and the risk of not including the “right foods” to help their child heal. In today’s culture, “All Foods Fit” can sound permissive, scary, or even “unhealthy.”
Is “All Foods Fit” just a nice idea? Not quite. It’s a clinical approach to nutrition that prioritizes your biology over diet culture rules. Here is the “why” behind the philosophy:
- Biology, not Willpower: Through a process called habituation, giving yourself permission to eat all foods actually decreases food obsession and “food noise.”
- Improved Health Markers: Research shows that weight-neutral approaches are linked to better blood pressure and cholesterol levels than restrictive dieting.
- Lower Stress Levels: Removing “food guilt” lowers cortisol, which supports better digestion and metabolic health.
- A Protective Shield: Practicing Intuitive Eating is scientifically linked to lower rates of binge eating, depression, and chronic dieting.
What Does “All Foods Fit” Actually Mean?
The idea of “All Foods Fit” is a core tenet of Intuitive Eating and weight-inclusive care. It’s the idea that no food is inherently “good” or “bad,” and that a health-promoting diet can include everything from kale to KitKats. Unfortunately, this concept often gets dismissed in primary care offices or diet culture-heavy spaces as “giving up” on health.
But as we’ll dive into in this article, “All Foods Fit” isn’t just a nice sentiment to make you feel better about dessert. It is a biological and psychological necessity for a functioning metabolism and a calm, quiet mind.
Because the truth is, food labeling (calling foods “junk” or “guilty pleasures”) is misleading at best and harmful at worst. Most people acknowledge that “moderation” is good, but they fail to see how rigid food rules actually drive the very “out of control” feelings they are trying to avoid.
When we look at the origins of the “All Foods Fit” philosophy, it is noted to have resurfaced in the 1990s through the work of Registered Dietitians Evelyn Tribole and Elyse Resch (the founders of Intuitive Eating). They realized that the clinical approaches of the time involving prescribing restrictive diets were actually causing more disordered eating, more weight cycling, and more psychological distress.
Their work helped shift the focus from “What are you eating?” to “Why and how are you eating?” – allowing nutrition work to include aspects of human behaviour rather than a rigid list of “dos and don’ts.”
“All Foods Fit” is Grounded in Science. Four Reasons Why:
#1 It Encourages Food Habituation and Reduces Food Noise
Have you ever noticed that when you tell yourself you can’t have a certain food, it’s the only thing you can think about? That isn’t a lack of willpower, it’s biology! Habituation is defined as: a neurobiological process where the brain’s response to a stimulus decreases after repeated exposure.
Have you ever purchased a new perfume and loved how the scent seems to follow you all day? But then you notice after days of wearing it, you can’t smell it as strongly anymore? This is an example of habituation. Similarly, if you batch cook a delicious dinner and eat leftovers for the rest of the week, you may notice that you’re less excited to eat that meal as the days go by.
When you categorize food as off-limits, your brain stays in a state of hyper-arousal (read: food noise!). Research shows that when you give yourself unconditional permission to eat, the food eventually loses its “shiny” quality. It becomes just food.
By creating a pattern of eating that contains a wide variety of foods and includes both nourishing foods (for nutrition value!) and soul foods (those fun foods for enjoyment, social connection, and flavour!), you reduce the likelihood that certain foods will end up on pedestals within your brain. This creates a more neutral relationship with a wide variety of foods and reduces vulnerabilities for bingeing.
#2 It Improves Actual Clinical Health Markers
If you’ve been told that you need to cut out “bad” foods to save your heart, the data might surprise you. Science has repeatedly demonstrated that a weight-neutral, “all foods” approach often leads to better long-term health outcomes than restrictive dieting.
In a landmark study by Bacon & Aphramor (2011), the group that practiced an “all foods fit” approach (rooted in Health At Every Size principles) saw sustained improvements in blood pressure and LDL cholesterol. Meanwhile, the “weight loss” group saw their health markers rebound as soon as the diet became unsustainable.
#3 It Reduces the “Mental Gymnastics of Food” and Lowers Stress
When we label a food as bad, eating it triggers a stress response in the body. This can also create feelings of shame, which increases cortisol – a hormone that, when chronically elevated, can actually interfere with digestion and metabolic health.
A widely cited 2014 review by Dr. Tracy Tylka highlighted that those who didn’t judge their food choices (what we would define as Intuitive Eaters) had lower triglycerides and better vascular health. By removing the “moral” weight of food, you are literally lowering the physiological stress on your body and promoting a greater sense of well-being!
#4 It Protects Against Disordered Eating
A longitudinal study from Project EAT followed thousands of individuals through adolescence and young adulthood over 8 years. They found that those who practiced Intuitive Eating had:
- Lower odds of Binge Eating
- Reduced Chronic Dieting
- Fewer Depressive Symptoms
- Improved Self-Esteem
When we stop labeling food as “good” or “bad,” we stop labeling ourselves as “good” or “bad” for eating it. This is the foundation of building a flourishing life. I hope this offers encouragement for parents! Teaching your child that “all foods fit” can be a protective shield and reduce risks of disordered eating and the development of eating disorders. And for those of us navigating food relationships in adulthood, it is a reminder that embracing “All Foods Fit” is the only way to quiet the obsession so you can focus on the things that matter.
Meet Yourself with Compassion
If you have spent your life feeling like a failure because you couldn’t stick to a plan that labeled your favorite foods as bad, I want you to know: you weren’t failing! You were fighting against your body’s natural survival instincts and biology.
By equating healthy eating with restriction, we take the focus away from the joy of food and we lose the power of connection that food can offer. This is why in my practice, I take a weight-inclusive approach. I am far more concerned about you feeling strong, relaxed, and nourished than I am about you “perfecting” a plate based on arbitrary rules.
If you’re ready to move beyond the noise together, I’d love to support you! Check out my Services Page to learn more about how we can work together. Or if you’re ready to jump in book a FREE Connection Call below to chat with me!
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