Background

Obesity is a global public health crisis exacerbated by ultra-processed and nutrient-poor foods. Despite policy interventions, progress remains uneven due to socioeconomic, political, and industry barriers.

Objective

This review examines global food policies on obesity prevention, highlights implementation gaps, and suggests pathways for more equitable, coordinated action.

Methods

A narrative review was conducted using literature from PubMed and Scopus (2017-2025), including peer-reviewed studies, policy documents, and international agency reports. Key search terms included “global food policies,” “obesity prevention,” “ultra-processed foods,” “nutrition labeling,” and “sugar taxes.” Inclusion criteria encompassed studies on policy strategies for obesity prevention and healthier food environments.

Results

The review categorized food policy interventions into key thematic areas: fiscal policies, nutrition labeling, marketing restrictions, regulation of ultra-processed foods (UPFs), out-of-home/food-service policies (eg, menu and nutrient labeling, portion-size and sodium limits, healthy defaults, procurement standards), school food policies, and international coordination. Evidence shows that front-of-package labeling and sugar-sweetened beverage levies are effective in some regions. Healthy food subsidies and purchase incentives yield mixed but promising results, especially among low-income groups. However, socioeconomic disparities, industry resistance, weak regulations, and poor multisector and public–private partnerships (PPPs) governance limit their scalability and sustainability.

Conclusions

Current global food policy efforts are insufficient to curb the escalating obesity epidemic. Transformative, multisectoral, and equity-focused policy frameworks augmented by digital tools for monitoring, enforcement, and targeted health promotion are critical to accelerate progress and reduce inequities. Priority should be given to regulating UPFs, standardizing labels, tightening marketing controls, and integrating obesity prevention into health policies.

Plain Language Title

Global Food Rules and the Fight Against Obesity: Why Current Efforts Fall Short and What Can Be Done to Create Fair, Healthy, and Sustainable Food Systems for Everyone.

Plain Language Summary

Obesity is rising at alarming rates worldwide, affecting people of all ages and income levels. More than a billion people are now living with obesity, and this number is expected to keep growing. It is not just about personal choices as modern food systems make it easier and cheaper to buy unhealthy, ultra-processed foods than fresh, nutritious ones. Governments and international organizations have tried many strategies to tackle this problem. These include taxing sugary drinks, adding clear nutrition labels to packaging, limiting junk food advertising, especially to children, and providing healthier school meals. Some of these measures have worked in certain countries. For example, sugar taxes in Mexico and the UK have reduced sugary drink sales, while Chile's warning labels have encouraged manufacturers to make products healthier.

However, progress has been slow and uneven. Many policies are poorly enforced, not widespread, or too weak to make a big difference. Powerful food industry lobbying, limited government resources, and lack of global coordination make change harder. People in low-income or rural areas often cannot afford or access healthy foods, and public education campaigns are not always strong enough to change habits.

The review calls for a more united, fair, and science-based approach. This means setting global rules for labeling and marketing, focusing more on reducing ultra-processed foods, expanding subsidies for healthy foods, and ensuring policies are culturally appropriate and equitable. Digital tools can make these policies work better. For example, governments can use simple phone apps and open dashboards to track the prices and availability of healthy foods, while AI can help monitor junk-food ads aimed at kids. Text-message or app reminders can also nudge healthier choices without adding extra clinic visits.

Ultimately, obesity prevention should be linked with other areas like urban planning, education, and agriculture so that healthier food choices become the easiest choices for everyone. Without stronger, fairer, and more coordinated action, the world risks an even greater health crisis in the years to come. Because we reviewed many kinds of studies and did not run a formal systematic review, these results show promising directions rather than final answers.