What Health at Every Size Actually Means (And Why It’s Not Anti-Health)

You’ve probably heard the term. Health at Every Size, often abbreviated HAES.

Maybe you encountered it through an Instagram account that posts body-positive content. Maybe you saw it in a dietitian’s bio. Maybe a friend mentioned it. Maybe you found it through your own research into intuitive eating, and you noticed it kept coming up alongside terms like “anti-diet” and “weight-neutral.”

You might have an opinion about it. You might think it sounds reasonable. You might think it sounds like denial. You might think it means “all weights are equally healthy” — and have either embraced that idea or been deeply uncomfortable with it.

Most people who have opinions about HAES — supporters and critics alike — are working from a misunderstanding. The framework is more nuanced than its loudest advocates make it sound, more rigorous than its critics give it credit for, and more recently updated than almost anyone in the public conversation realizes.

This post is the long, honest version of what HAES actually is, what it isn’t, where it came from, what the research shows, and what the 2024 revision changed. By the end, you’ll know whether the framework fits how you want to think about your health — and you’ll be able to defend or disagree with it on actual grounds instead of caricatures.

Let’s go.

What HAES actually says

Health at Every Size is a framework that separates two things diet culture has spent decades fusing: weight and health.

The framework says, in its simplest form: health is something you can pursue at any body size, through behaviors and access to care, rather than through trying to make your body smaller. Weight is not a reliable proxy for health. Health behaviors — movement, nutrition, sleep, stress management, social connection, healthcare access — produce real health outcomes regardless of body size.

That’s the foundation.

HAES is not the claim that “everyone is healthy at every size.” It’s the claim that weight is the wrong variable to use as your health target. There’s an important difference between those two statements, and almost all the bad-faith critiques of HAES collapse the second one into the first.

HAES doesn’t say obesity isn’t a health concern. It says that focusing on weight has produced demonstrably bad health outcomes — through dieting damage, weight stigma, healthcare avoidance, and treatment failures — and that focusing on behaviors and behaviors first, regardless of weight, produces better outcomes for people of all sizes.

The framework was developed primarily by registered dietitian Lindo Bacon, registered dietitian Lucy Aphramor, and other researchers and clinicians. The foundational academic paper is Bacon and Aphramor (2011), “Weight Science: Evaluating the Evidence for a Paradigm Shift,” published in Nutrition Journal. It remains one of the most-cited papers in the weight-inclusive care literature.

The 2024 update most people don’t know about

This is the part of the HAES conversation that’s hardest to navigate, because most people online — including many people who claim HAES alignment — are still working from an older version of the framework.

In March 2024, the Association for Size Diversity and Health (ASDAH), which is the official steward of the HAES framework, released a major revision to the HAES Principles. The 2014 version had five principles focused on individual health and wellbeing. The 2024 version is more compact, more politically grounded, and explicitly aligned with fat liberation rather than presented as a neutral health framework.

The four 2024 HAES Principles are:

1. Healthcare is a human right for people of all sizes, including those at the highest end of the size spectrum.
2. Wellbeing, care, and healing are resources that are both collective and deeply personal.
3. Care is fully provided only when free from anti-fat bias and offered with people of all sizes in mind.
4. Health is a sociopolitical construct that reflects the values of society.

Alongside these principles, ASDAH released a Framework of Care containing ten elements: grounding in liberatory frameworks, patient bodily autonomy, informed consent, compassionate care, critical analysis of weight-related research, skills and equipment for fat bodies, provider roles and responsibilities, tools that don’t contribute to oppression, addressing your anti-fat bias, and addressing systemic anti-fat bias.

Why this matters: the 2024 framework is significantly different in tone and substance from what most people think of when they hear “HAES.” It is more explicitly grounded in fat liberation, more skeptical of weight science generally, and more politically engaged. ASDAH itself now states that HAES “is not a liberatory framework or social justice movement in and of itself, but rather aims to align with other movements.”

For someone trying to figure out their own relationship with food, weight, and health, this matters in a specific way: HAES has evolved from a clinical practice framework into something closer to a values orientation. The clinical applications — the actual day-to-day work of approaching health without weight as a target — are still there, but they sit inside a broader political analysis.

I find this evolution useful but I want to be honest with you: it can make HAES harder to recommend to people who are just trying to heal their relationship with food. The newer framework requires some willingness to engage with concepts like systemic bias, fat liberation, and the social construction of health. Most clients don’t arrive ready for that conversation. They arrive tired of dieting.

In my own practice, I describe my approach as “weight-neutral” and “HAES-aligned,” which signals the clinical orientation without requiring every client to engage with the full political framework. This is a common practitioner approach. It’s not a betrayal of HAES; it’s a recognition that frameworks are tools and clients need accessible doorways.

What HAES does NOT say

The misunderstandings about HAES are persistent and worth addressing directly.

HAES does NOT say all weights are equally healthy.

The framework doesn’t make claims about health at any specific weight. It makes claims about how to pursue health — namely, through behaviors and care rather than through weight loss attempts. The question “is being fat unhealthy?” is one that HAES explicitly steps around, because the research is more complicated than the headlines suggest, and because making that the central question has led to decades of failed weight loss interventions and increased weight stigma.

The clinical position is closer to: regardless of where your weight falls, your health outcomes are more strongly influenced by your behaviors, your social support, your healthcare access, and your stress levels than by your weight itself. Pursuing health through these levers is more reliable than pursuing it through weight change.

HAES does NOT say dieting is morally wrong.

This is a common framing in HAES-influenced spaces, but it’s not really what the framework claims. HAES is a clinical and policy framework, not a personal ethics framework. It doesn’t moralize people who diet. It does point out that the diet industry, as a system, has produced significant harm — to bodies, to mental health, to social conditions for fat people — and argues for an alternative approach to clinical care.

You can practice HAES principles in your own life without believing that every person on a diet is doing something wrong. The framework is critical of systems, not individuals.

HAES does NOT mean “let yourself go.”

This is the framing critics use, and it’s basically a strawman. HAES is intensely interested in actual health — nutrition, movement, sleep, stress management, mental health, social connection, healthcare access. The framework is not about giving up on health. It’s about pursuing health through more effective levers than weight manipulation.

HAES does NOT claim that intentional weight loss is impossible.

The framework’s position is that intentional weight loss is rarely sustainable for most people, that the cost of attempting it is often higher than the benefit, and that the medical focus on weight loss has produced demonstrable harms. None of that is the claim that no individual has ever maintained weight loss. The claim is about populations and clinical outcomes.

HAES is NOT against medical care.

Some critics frame HAES as anti-medicine. It isn’t. HAES is critical of weight-centric medical care — care that uses weight as the primary metric, prescribes weight loss as primary treatment, or denies care to fat patients pending weight loss. It strongly advocates for medical care that treats actual conditions, addresses actual symptoms, and uses appropriate diagnostic and treatment approaches that work regardless of patient size.

The evidence for HAES

Let me walk through the research that supports the framework, because this is where the conversation usually goes thin.

The foundational paper

Bacon and Aphramor’s 2011 paper in Nutrition Journal reviewed six randomized controlled trials of HAES-aligned interventions versus weight-loss-focused interventions. The HAES interventions produced improvements in physiological measures (blood pressure, cholesterol), health behaviors (eating quality, physical activity), and psychosocial outcomes (body image, self-esteem, mood). Critically, the improvements were sustained at follow-up, while the weight-loss-focused groups in the comparison studies typically lost these gains as they regained weight.

The paper’s central argument is that weight-loss-focused approaches show a consistent pattern: short-term weight loss, gradual regain, and net negative health and psychological outcomes over time. HAES-aligned approaches show a different pattern: stable or modest weight changes, sustained behavior improvements, and net positive psychological outcomes.

The Mensinger RCT

A 2016 randomized controlled trial by Janell Mensinger, Rachel Calogero, Saverio Stranges, and Tracy Tylka, published in Appetite, directly compared a weight-neutral intuitive eating approach to a weight-loss approach in women with high BMI. The 80 participants were randomly assigned to one of the two interventions.

The findings: the weight-neutral group showed greater improvements in eating behaviors, body image, and psychological wellbeing. Physical health markers (blood pressure, cholesterol, etc.) improved in both groups during active intervention. Crucially, the weight-neutral group maintained its psychological gains at follow-up, while the weight-loss group experienced declines as participants regained weight.

This is RCT-grade evidence. It directly compares the two approaches under controlled conditions and finds the weight-neutral approach produces better sustained outcomes.

Behaviors over weight: the Matheson study

In 2012, Matheson, King, and Everett published a study in the Journal of the American Board of Family Medicine analyzing the relationship between four health behaviors (regular physical activity, eating 5+ fruits/vegetables daily, moderate alcohol use, not smoking) and mortality risk across BMI categories.

The finding: people practicing 2–4 of these healthy habits had similar mortality outcomes regardless of BMI category. The behaviors mattered. Weight, controlled for behaviors, was a much weaker predictor of mortality than the public conversation implies.

This is one of the most-cited studies in weight-neutral care because it provides a clear empirical foundation: behaviors are the lever. Weight is the noise.

Fitness over fatness: the Gaesser & Angadi review

In 2021, Glenn Gaesser and Siddhartha Angadi published a major review in iScience titled “Obesity treatment: Weight loss versus increasing fitness and physical activity for reducing health risks.” The paper reviewed decades of data on cardiovascular outcomes and concluded that increasing physical activity and cardiorespiratory fitness produces larger reductions in cardiovascular and all-cause mortality than weight loss does — and the benefits are largely independent of whether weight changes.

This is significant because it cuts against the standard medical framing that weight loss is necessary for cardiovascular health. The evidence suggests fitness, not thinness, is the protective factor.

Weight cycling and health risks

A growing body of research demonstrates that weight cycling — the pattern of losing and regaining weight repeatedly that characterizes most chronic dieting — is independently associated with worse cardiometabolic outcomes than stable higher weight. Studies by Montani and colleagues (Obesity Reviews, 2015), Bangalore and colleagues (New England Journal of Medicine, 2017), and others have documented this pattern across cardiovascular events, type 2 diabetes outcomes, and even cancer incidence.

The implication: the pursuit of weight loss, through repeated unsuccessful diets, may itself be harmful. This is part of why HAES argues that the standard medical recommendation to lose weight often produces net harm rather than net benefit, even when the goal of weight loss is health.

Weight stigma as an independent health risk

Some of the strongest evidence in HAES-aligned literature concerns weight stigma. A 2015 study by Sutin, Stephan, and Terracciano, published in Psychological Science, followed adults over a decade and found that experiencing weight discrimination was associated with a 60% increased risk of mortality, independent of BMI.

A 2018 paper in BMC Medicine by Tomiyama and colleagues, titled “How and why weight stigma drives the ‘obesity epidemic’ and harms health,” synthesized the evidence on stigma’s biological and behavioral effects. Weight stigma triggers chronic cortisol elevation, inflammatory responses, healthcare avoidance, disordered eating, and reduced exercise — all of which independently harm health regardless of weight.

The research is clear: how fat people are treated affects their health at least as much as their weight does. Reducing weight stigma is a health intervention. HAES is, in part, an effort to systematize that intervention.

What HAES looks like in practice

If you’re trying to figure out how HAES principles might apply to your own life or health, here’s the practical translation.

Stop using weight as a primary health metric.

If you’ve been tracking your weight as the main indicator of your health, that’s the first shift. Other metrics tell you more: how you feel, your energy, your sleep quality, your mood, your strength, your relationships with food and movement, your lab markers if you have them. Weight, as an isolated number, is a noisy and unreliable signal of health.

Pursue health through behaviors and care, not weight change.

Move your body in ways that feel good. Eat in ways that nourish you and bring satisfaction. Sleep enough. Manage stress. Tend to your mental health. See doctors when you need to. Get the screenings appropriate for your age and family history. Take medications you need. Address actual symptoms instead of treating weight as a symptom.

These behaviors and care patterns produce real health outcomes. They are levers you can actually pull.

Find weight-inclusive healthcare.

This is harder than it sounds, because most healthcare in the U.S. defaults to weight-centric framing. Look for providers who describe themselves as “HAES-aligned,” “weight-inclusive,” “weight-neutral,” or specifically anti-diet. Tell new providers explicitly that you don’t want weight-loss-focused care. Request not to be weighed at appointments if it doesn’t serve a clinical purpose.

The Association for Size Diversity and Health maintains a provider directory. So does the Health at Every Size Community organization. Some cities have local directories. It’s not always easy to find good care, but it exists.

Notice your own internalized weight stigma.

This is the slow internal work. Most of us, regardless of body size, have absorbed messages from diet culture that fat is unhealthy, fat is lazy, fat is morally suspect. These messages affect how we see our own bodies and how we see other people’s bodies. Working through that internalization is part of what HAES asks of practitioners and supporters. It’s also part of how you stop spending mental energy on weight management and free that energy for actual health.

Resist the urge to make HAES into another rule system.

This is one I see often, and it’s worth flagging. Some people who encounter HAES try to turn it into another set of rules — “I’m not supposed to want to lose weight.” “I’m not supposed to care about my body size.” “I should celebrate every body.” When HAES becomes another should, it loses its actual usefulness.

The framework isn’t a moral system. It’s a clinical and practical reorientation. You’re allowed to have complicated feelings about your body. You’re allowed to wish you weighed less and also know that pursuing that wish through dieting will probably make your life worse. Both things can be true.

What HAES doesn’t fix

Honest part: HAES isn’t a complete solution to every problem you might have with your body and food.

It doesn’t make weight stigma in the broader world go away. You can fully internalize HAES principles and still encounter doctors who lecture you about your weight, family members who comment on what you eat, and a society that treats thinness as a moral virtue. HAES gives you a framework for evaluating those experiences. It doesn’t eliminate them.

It doesn’t automatically heal body image issues. Body image work is its own discipline, related to but distinct from HAES. Most chronic dieters need explicit work on body image, often with a therapist or coach, to begin shifting how they see themselves. Adopting HAES principles is helpful but rarely sufficient.

It doesn’t tell you what to eat. HAES is a framework for how to think about eating. The actual practice of eating well — what nutrition looks like, what satisfaction looks like, what intuitive eating involves — requires its own work. HAES and intuitive eating are typically practiced together, and most HAES-aligned dietitians integrate them.

It doesn’t make the desire to lose weight go away. Diet culture has trained most of us, especially women, to want to be thinner. That conditioning is deep and persistent. Knowing intellectually that dieting harms you doesn’t always make the wish to be smaller disappear. The work of HAES is partly the work of sitting with that wish, understanding where it comes from, and choosing not to act on it — without pretending it isn’t there.

How HAES connects to the rest of the work

HAES is one of three pillars I work from in my own practice. The other two are intuitive eating and motivational interviewing.

Intuitive eating gives you the practical, day-to-day framework for relating to food — the ten principles that walk you through rejecting diet mentality, honoring hunger, making peace with food, and so on. I write more about it in my post on what intuitive eating actually is.

HAES gives you the broader orientation toward health — the recognition that health behaviors matter more than weight, that weight stigma is itself a health concern, and that pursuing health through weight loss has produced more harm than good.

Motivational interviewing gives you the relational framework for change — a way of working with your own ambivalence and motivations that doesn’t rely on prescriptive advice or external rules.

Together, these three create a coherent alternative to diet-culture approaches to food, body, and health. Not a quick fix. Not a different diet. A genuinely different way of relating to all of it.

What’s next

If HAES resonates with you, here’s the realistic path.

Read the foundational texts. Bacon and Aphramor’s Body Respect is the most accessible introduction. Lucy Aphramor and Lucy’s writing online is excellent. Christy Harrison’s Anti-Diet is a popular-press translation that incorporates HAES principles.

Notice when you’re using weight as a proxy for health. When you check the scale, what are you actually checking? When you evaluate your body, what’s the metric you’re using? Becoming aware of how often weight functions as your health shortcut is the start of replacing it with better metrics.

Find HAES-aligned providers. A HAES-aligned dietitian, a weight-inclusive doctor, a body-positive therapist. The change in care experience is significant.

Do the intuitive eating work alongside. HAES gives you the orientation; intuitive eating gives you the practice. Both are needed.

If you want a self-guided start, my workbook Diet Dropout: An Intuitive Eating Workbook walks you through this work in a structured way. It’s HAES-aligned throughout. It’s on Amazon.

If you want help, I do 1:1 sessions, a 4-week Foundation program, and a 6-month mentorship called The Full Dropout. The discovery call is free — and yes, it’s a real conversation, not a sales pitch.

But the most important thing I can say to you is this.

Your body is not the problem.

The framework that’s been telling you your body is the problem is the problem.

There is a way to take care of your health that doesn’t require you to be at war with the body you have. HAES is one name for it. Intuitive eating is part of how you practice it. Motivational interviewing is how the practice unfolds in conversation.

Together they form an actual answer to the question diet culture has been asking you the wrong way for decades.

You are not the project. You are the person.

— Kayla
Founder, Diet Dropout
Author, Diet Dropout: An Intuitive Eating Workbook

Related posts

• What Intuitive Eating Actually Is (And What It Isn’t)
• Why Diets Don’t Work: The Science Behind the 95% Failure Rate
• The Restrict-Binge Cycle: Why It Happens, and How to Step Out
• Set Point Theory: Why Your Body Has a Weight It Won’t Let Go Of