Why “Food Rules” Feel Good But Are Keeping You Stuck

By Emily Van Eck, MS, RDN | Empowered Treatment

Stay EMPOWERED |

Stay Connected |

Stay EMPOWERED | Stay Connected |

It’s perfectly healthy and normal to have some gentle and flexible food preferences that are based on healthy habits. Like enjoying fruit with breakfast so making sure it’s stocked in your fridge, eating a side salad with dinner, setting a bedtime reminder, or going on daily walks. All great things.  

But there is a point in which healthy goals around food and exercise can turn rigid and disordered and can even be part of an eating disorder. 

Food rules are one of the most misunderstood aspects of eating disorders, both by patients and by the general population. People often describe their rules as preferences, or caring about their health, or "just the way I eat." And in some cases, you genuinely can't tell the difference. That's not a character flaw or a lack of self-awareness. It's how eating disorders work. They’re sneaky.  

This post is for anyone who has wondered whether the way they think about food is ok, for people wondering if they have an eating disorder, and for clinicians and loved ones who want to understand what's really happening beneath the surface of all those rules and thoughts and fear about eating.  

What a Food Rule ACTUALLY Is

A food rule is any rigid guideline about eating that feels non-negotiable or terrifying to break. It's not "I tend to prefer salads at lunch but my colleagues are going to a burger place today and that’s just fine", it's "I cannot eat a burger at lunch ever, so I’ll just stay at my desk and eat my salad.”  

It might sound like “I’m scared to eat anything with more than 4 ingredients”, where something more gentle like “I like to eat whole foods.” is more of a loose preference. 

The difference between a preference and a rule can be seen when you consider what happens when the rule is broken. Real preferences flex with circumstances, may change day to day, and don't cause emotional turmoil. Rules, when broken, produce guilt, anxiety, shame, panic, and often compensatory behaviors like binging, purging, or more restricting.  

Food rules show up across many categories. There are timing rules (no eating before noon, no eating after a certain hour), type rules (no carbs, only "clean" foods, nothing processed), amount rules (no seconds, strict calorie limits), combination rules (never carbs and fat in the same meal), ritual rules (eating in a specific order, cutting food a certain way, only eating alone), and compensatory rules (exercising to "earn" food, or skipping the next meal after eating more than planned).  

Eating disorders can be riddled with rules, making eating extremely complicated and anxiety-provoking.  

Most people dealing with an eating disorder hold rules in multiple categories simultaneously, often without realizing how many they've accumulated or how severely they’re affecting their quality of life. Allowing food rules to get in the way of socializing is a common way they impact quality of life.  

How Food Rules Get in the Way of Good Nutrition

Despite what diet culture may make you think, having rules about food can actually make you less healthy and nourished. Rules that eliminate whole food groups, restrict eating to narrow windows, or require "earning" certain foods make it genuinely difficult to nourish your body consistently.  

A person following a strict no-white carb rule isn't just missing out on bread and pasta— they're missing out on glucose, fiber, B vitamins, iron, and the kind of eating flexibility that actually supports long-term wellbeing. A person who can't eat past a certain hour might go to bed underfed which can disrupt sleep, cause low blood sugar, and increase anxiety. 

A rule to only eat “whole foods” and “nothing white or processed” can result in too much fiber, not to mention a ton of exhausting effort. Too much fiber can cause bloating, cramping, constipation, and reduced absorption of key minerals. 

Believing that only certain fats are okay - nuts and avocado, but not butter or olive oil or the fat in a piece of salmon for example, can leave the body without the fat it needs to absorb fat-soluble vitamins, regulate hormones, and support brain function.  

The irony is that food rules often develop in the name of health, while quietly working against it. 

Where Rules Come From

Food rules tend to develop from a combination of sources, some personal and some societal. In order to challenge food rules, understanding that they came from somewhere and aren’t just “facts” is the first step to understanding the harm they’re doing in your life and learning how to change the way you think about food.   

Diet culture, which talks about restriction in the language of health and discipline, is the most common place we acquire food rules. Any diet, weight loss plan, cleanse, detox, etc you’ve ever been on or ever heard about likely has tons of “good” and “bad” foods, which gradually get absorbed into our beliefs about what’s “healthy” and “unhealthy”. But remember, these are almost always just about quick weight loss and not about actual health and well-being.  

Family environments can be a source as well. Messages about food, bodies, and worth are easily passed down from parents, grandparents, or other family members. These are particularly hard because they’re absorbed long before you had any idea how to question them. Mom says bread makes her fat - you may easily absorb that bread is bad and so is fat. But as we know, both are neutral.  

Healthcare providers, coaches and peers can also pass on misinformation with the best of intentions, but have just not been informed about how delicate a growing brain and body is in relation to their relationship with food.  

Then we have the eating disorder itself, which is an extraordinarily skilled rule-generating system.  

The ED takes information from the environment and sharpens it into increasingly specific, increasingly rigid guidelines. One rule about carbs becomes a rule about carbs at dinner specifically, which becomes a rule about starches after 5pm, which eventually becomes a framework so elaborate it takes most of the day's mental energy to maintain. 

Why Rules Are So Hard to Let Go Of: The Role of Cognitive Flexibility

Food rules are not irrational. They developed because they served a function, and that function is usually managing anxiety and creating a sense of order in a world that felt overwhelming or out of control. 

Eating disorders develop as a control mechanism. When life feels uncertain, food can seem like an area where control can help you feel better. And in the short term, the rules work. Following a rule genuinely reduces anxiety in the moment. That's why they're so persistent, and why simply being told to "just relax about food" rarely helps.  

People with eating disorders tend to have a genuinely hard time with cognitive flexibility, which is the brain's ability to shift thinking, adapt to new information, and move fluidly between different situations. Research by Tchanturia and colleagues has found that this pattern is a documented feature of eating disorders, not stubbornness. The rules feel non-negotiable and necessary from the inside because the brain has become very skilled at maintaining them. 

Adequate nourishment is what makes change possible, because the brain depends on consistent nourishment to think flexibly. When it isn't getting what it needs, thinking becomes more rigid and more resistant to change, which means restriction can actually deepen the very patterns that make recovery harder. Expanding cognitive flexibility works alongside nutritional rehabilitation to gently build flexible thinking over time, in a supported setting where that process feels survivable. 

The Hidden Food Rules: Mental Restriction

One of the most important concepts in eating disorder recovery is something called “mental restriction”, and it applies to the many people with eating disorders whose beliefs about what they “should” be doing contradict what they’re actually doing.  

Mental restriction is what happens when you eat a food while simultaneously telling yourself you shouldn't be eating it. Even if the food goes in, the psychological experience of deprivation is still happening. Shame, self-criticism, the sense of having failed or lost control can feel overwhelming. 

This means that someone who is eating enough and binge eating regularly can still be deeply restricted, in a psychological sense, if their internal landscape is dominated by food rules they feel unable to follow. 

This also explains why food rules cause harm whether you follow them or not. Rigid adherence leads to physical and psychological restriction, increasing rigidity, and often binges when the rules inevitably break. But having the rules without following them, which is the experience of many people with binge eating disorder or bulimia nervosa, creates the same shame spiral. 

It’s really important to understand that no matter how much you’re actually eating on a daily basis and how much you weigh, you need to loosen up your food rules in order to stop blaming yourself and heal from your eating disorder.   

The Difference Between a Rule and a Preference

One of the most useful questions to ask yourself is: what would happen if I did the opposite? If the honest answer is "not much, I'd just prefer not to," that's a preference. Preferences are flexible, context-dependent, and don't require justification. You don't need a story to explain why you like apples. You just do. 

Rules come with stories. They come with reasons, exceptions, and conditions. And when a normal life thing threatens them like a restaurant that doesn't have the “right” options, a social event with food, or wanting a piece of cake at a bday party, the emotional response is significant and often disproportionate to the actual situation. 

If you find yourself insisting that something is just a preference but noticing a strong emotional charge when the topic comes up, it’s worth considering whether your mental rigidity around food is helpful or not.  

What This Looks Like in Eating Disorder Treatment

At Empowered, food rules are a core focus of our nutrition curriculum for exactly the reasons described here. In a group setting, something powerful happens when people begin to recognize that the rules they've been carrying are shared and common and that they’re supported enough to break them gradually.  

Your food rules aren’t character flaws but patterns that make complete sense given the nature of eating disorders and the cultural environment we all live in. 

The work isn't about confronting rules aggressively or being told what to eat. It's about developing enough curiosity about the rules to start asking: where did this come from? What is it trying to protect me from? And is it actually doing that, or has it become the problem?  

And then: What do I need to eat, think, and do in order for me to feel safe and flexible around this food? 

That process takes time, and it goes much better with support. Eating disorder recovery is rarely linear, and dismantling food rules can be hard work, but it's also where a lot of people begin to feel like themselves again. They realize they are thinking less about food. And that’s ultimately what everyone wants.  

A Note for Clinicians and Loved Ones

If you're reading this because someone you care about seems to have a complicated relationship with food, one of the most useful things to understand is that food rules often don't look like a disorder from the outside. They can look like discipline, or health consciousness, or just particular preferences. But just because our society prizes these aspects does not mean they are healthy.  

Approaching your loved one with curiosity rather than confrontation, and connecting them to professional support rather than trying to challenge the rules directly, tends to go better for everyone. 

Ready to Learn More?

Empowered’s eating disorder treatment program offers specialized nutrition groups, individual sessions with a registered dietitian, and a team-based approach to eating disorder recovery for adults. Our curriculum is built on a Health at Every Size framework, takes a weight-neutral approach, and integrates Intuitive Eating principles in a way that's carefully adapted for where each person actually is in their recovery. 

If you're in Austin and curious about whether our IOP might be a fit, we'd love to connect.

Emily Van Eck, MS, RDN is a registered dietitian and certified Intuitive Eating counselor specializing in eating disorder recovery.