Abstract The world’s large and growing appetite for meat and other animal products has profound implications for One Health, given its impacts on human health, the environment and animal health and welfare. Accordingly, there is robust evidence that a reduction of animal product consumption is urgently needed in regions where these consumption levels are currently high. A shift away from industrial animal production should be prioritized, given the high levels of animal product consumption this kind of system enables, its relatively high environmental toll, linkages to increasing risks of antimicrobial resistance and zoonoses emergence and harm to animal welfare. Until recently, however, few governments addressed the issue. On the contrary, many governments actively support industrial animal agriculture through subsidies and other measures. Now, motivated by both environmental and public health concerns, policy makers in several countries are adopting regulatory and financial measures to address the overconsumption of animal products. Although these changes are clearly necessary and long overdue, it is crucial that they are planned carefully and inclusively to ensure a just transition. In lower-resourced and food-insecure settings, meat and other animal products can be a vital source of nutrients – particularly during infancy and childhood. In addition, meat supply chains support many livelihoods, and meat is an important part of many people’s social and cultural traditions. This means that policies that curtail common production practices, reduce meat output and raise meat prices could have significant impacts across society. A just transition approach can help ensure that the costs and benefits of the transition are more equitably distributed and protect the most vulnerable stakeholders. By doing so, it can also help increase public support for the transition. The concept of just transitions is well established in the energy sector but is only starting to be recognized in the context of the food system. Governments in the Global North should take the lead in this area, given these countries have very high levels of animal product consumption and more resources available to support a transition. In this Policy Forum, we lay out the case for a just transition in animal agriculture and identify five principles to guide policy makers in promoting a just transition away from systems of industrial meat production and overconsumption. One Health impact statement Drawing on expertise from health, climate, biodiversity and animal welfare policy and science across several regions, this Policy Forum demonstrates how current levels of animal product production and consumption threaten One Health. Although a transition to a healthier, more sustainable and more compassionate food system is clearly needed, such a transition will necessarily involve both costs and benefits for affected stakeholders. Identifying lessons from international and national climate policy, and energy policy in particular, the authors highlight the value of an approach that is holistic and centred on just transition principles to support a transition away from large-scale animal product production and consumption that is in line with the One Health approach, with an emphasis on transitioning away from the consumption and production of industrially-produced meat. This Policy Forum is relevant to policy makers, companies and civil society seeking to promote a shift towards food systems that emphasize public and planetary health.