Where weight bias research goes next

Why weight bias needs to be on the research agenda

Weight bias is still often misunderstood and dismissed as a side issue, even though it shapes how people are treated in healthcare, education, work, and everyday life.

In simple terms, weight bias means negative assumptions and stereotypes about people because of their weight. Weight stigma is what happens when those beliefs show up in real life through judgment, exclusion, or discrimination. The Summit’s published findings make clear that these experiences are linked to real social and health inequities, and that they continue to affect people in healthcare, education, employment, media, and personal relationships.

Supported in part by Obesity Canada, the summit brought together researchers, clinicians, organizational leaders, and people with lived experience from across North and Latin America, Europe, and Australia. The goal was clear: identify what weight bias research should focus on next, and what is still slowing progress.

This was an opportunity to reflect on the field and help shape it with a clearer direction.

How future priorities were identified

The summit took place in Montreal on October 24 and 25, 2024. It brought together 33 invited participants from countries including Canada, the United States, Mexico, Australia, France, Iceland, Spain, Sweden, and the United Kingdom. They came with different perspectives and expertise: research, clinical practice, organizational leadership, and lived experience.

The event opened with a lived experience panel. People from Canada, Iceland, Mexico, and France shared what weight stigma and discrimination had looked like across their lives. Only then did the research showcase and structured small group discussions begin.

That choice set the tone for the event. The conversation did not begin with theory alone. It began with the realities people live with, and then asked what kind of research could help change them.

What the summit identified

The summit discussions later informed a peer-reviewed paper published in the International Journal of Obesity. It identified six key research directions for the field, presented without ranking, reflecting the fact that progress is needed on several fronts at once.

The consequences of weight bias and stigma

Participants called for stronger research on the physical, psychological, and social consequences of weight bias, including how these harms play out over time and in different settings.

Conceptual and methodological clarity

Participants also pointed to a need for clearer definitions, stronger study designs, and better tools for measuring weight bias and stigma. That includes making sure research language and methods used are consistent, respectful, and useful in real-world settings.

Diversity in sampling, cultures, and settings

Much of the existing research still reflects a narrow range of countries and experiences. Future work needs to include a broader range of cultures, communities, and settings.

Interventions

The field also needs more evidence on what actually helps reduce weight bias and stigma, and what helps support people who experience it and the harm it causes. Participants identified this as a major gap and a major opportunity.

Policy

Policy emerged as another priority, including research that can inform anti-weight-discrimination measures, institutional change, and better protection for people affected by weight bias.

Implementation science

Participants also pointed to the need for research that helps move good ideas into practice, especially in healthcare, education, and workplaces.

Why these priorities matter

Taken together, these priorities mark a shift in this field.

This is no longer only about proving that weight bias exists. That evidence is already there. The next challenge is building stronger research that can shape interventions, inform policy, and support changes people can actually feel in their lives.

Weight bias is not an abstract issue. It shapes care, access, opportunity, and well-being. And while awareness of weight stigma has grown, the summit made clear that awareness on its own will not change systems. The field now needs more coordinated action and stronger evidence to support it.

What’s still slowing progress

The summit also identified three major barriers: widespread misconceptions and lack of recognition of weight bias as a legitimate issue, funding challenges, and a lack of collaboration caused by siloed work.

These barriers help explain why change has been uneven. When weight bias is minimized, it’s easier to overlook. When it’s overlooked, research funding becomes harder to secure. And when researchers work in isolation, it’s harder to build momentum across systems and countries.

Naming those barriers was an important outcome in itself. It made clear that the challenge is not only what to study next, but also what needs to change around the work itself.

What comes next

The impact of the summit did not end in Montreal.

Its findings have already been shared through a peer-reviewed publication, a public webinar, and conference presentations. The summit also marked a first step toward building an International Weight Bias Research Network that could strengthen collaboration, widen participation, and bring more underrepresented voices into the conversation.

For Obesity Canada, supporting this work means helping connect science, lived experience, and action in ways that can shift both stories and systems. For the broader field, the summit offered something valuable: a clearer sense of where weight bias research needs to go next.