Can Your Diet Affect Lung Cancer Risk? The Latest Findings Explained

Eat Better, Breathe Easier? Research Points to Link Between Diet and Lung Cancer

For years, we’ve been told that our diets play a crucial role in the development of various types of cancer, such as liver and pancreatic cancer. Researchers have long studied the impact of nutrition on the development of these diseases, giving rise to public health guidelines concerning red meat consumption, alcohol intake, and other dietary factors. However, one organ that hasn't been traditionally linked to diet-related cancer risk is the lungs. This is now changing, thanks to new research from scientists at the University of Florida Health.

The Link Between Diet and Lung Cancer

A recent study led by a team from the University of Florida Health, in collaboration with the University of Kentucky’s Markey Cancer Center and the UF Health Cancer Center, is changing the way we think about lung cancer. While lung cancer is often associated with smoking and environmental factors, this new research suggests that poor dietary habits may also contribute to the development of lung cancer, specifically a subtype called lung adenocarcinoma, which accounts for approximately 40% of lung cancer cases globally.

Historically, the role of diet in lung cancer has been underexplored compared to other cancers. Dr. Ramon Sun, an associate professor at UF and director of the Center for Advanced Spatial Biomolecule Research, explained that lung cancer has not been traditionally considered a diet-related disease, unlike conditions such as pancreatic or liver cancer. However, this new study brings attention to the possibility that diet—specifically, the types of foods we consume—could influence lung cancer risk.

The Role of Glycogen in Lung Cancer

To understand the connection between diet and lung cancer, the researchers focused on glycogen, a molecule composed of glucose that the body uses for energy storage. Interestingly, glycogen has been found to accumulate in high levels across various cancers and other diseases. This discovery is pivotal because, in the case of lung cancer, glycogen may act as an oncogenic metabolite, providing a "sweet tooth" for cancer cells.

The research team utilized high-content spatial metabolomics, a groundbreaking platform developed by Dr. Sun in 2020, to visualize disease patterns and interactions at a molecular level. This allowed the researchers to observe how glycogen accumulation plays a central role in lung cancer tumor growth. The study revealed that when glycogen levels increased in lung cancer cells, tumor growth also accelerated. Conversely, when glycogen levels were reduced, tumor growth slowed down.

This is where diet comes into play. The team found that a "Western diet"—typically high in fats and fructose—contributes to elevated glycogen levels in the blood. This, in turn, supports the growth of lung tumors. In lab models, when mice were fed a high-fat, high-fructose diet, glycogen stores increased, and the size and growth of lung tumors were more pronounced. This suggests that the Western diet could potentially fuel the development and progression of lung cancer by providing cancer cells with the necessary building blocks for their growth.

Glycogen as a Predictor of Lung Cancer Outcomes

The researchers also highlighted that glycogen levels are not just associated with tumor growth, but they can also serve as a powerful predictor of patient outcomes. Sun emphasized that glycogen is an "exceptionally good predictor" of tumor growth and patient prognosis in lung cancer cases. This is a significant finding because it opens up potential avenues for early detection and targeted treatment of lung cancer, as glycogen levels could help clinicians identify patients at higher risk of aggressive tumor growth.

Shifting Focus on Cancer Prevention

While this study is groundbreaking in its exploration of the link between diet and lung cancer, it also sheds light on a broader issue: the importance of nutrition in cancer prevention. Dr. Matthew Gentry, a collaborator in the study, pointed out that the long-term approach to cancer prevention should mirror the successful anti-smoking campaigns. Just as public health policies have successfully promoted smoking cessation, Gentry advocates for a similar push towards promoting healthier dietary habits as a critical component of disease prevention.

In fact, there is already a growing body of evidence linking poor diet and increased cancer risk, but the research team believes that more attention should be given to the specific nutrients and dietary patterns that could mitigate these risks. As part of their work, they identified three types of drugs that target glycogen levels—drugs initially developed through studies of Lafora disease, a rare neurological disorder. This highlights the potential for repurposing existing treatments to tackle glycogen-driven cancer progression.

Simple Yet Effective Strategies for Prevention

While this research adds an exciting layer to the understanding of lung cancer, it also reinforces the message that maintaining a nutrient-rich diet, an active lifestyle, and minimizing alcohol intake are fundamental strategies for long-term health. Gentry's takeaway is simple yet profound: "Fostering better dietary habits can be a powerful tool in lung cancer prevention." While no single food or dietary pattern can guarantee immunity from cancer, small lifestyle changes—such as consuming fewer processed foods and more fruits, vegetables, and healthy fats—can go a long way in reducing cancer risk.

Conclusion

This study opens new doors for understanding the role of diet in lung cancer development and underscores the importance of dietary habits in cancer prevention. As we continue to study the relationship between nutrition and cancer, it’s clear that adopting a healthier diet can significantly reduce the risk of developing not only lung cancer but various other cancers as well. The findings offer hope for a future where public health efforts shift towards better nutrition as a cornerstone of cancer prevention.

As the research into glycogen’s role in lung cancer progresses, we may soon have more effective treatments and preventive measures at our disposal. For now, prioritizing a balanced diet and a healthy lifestyle remains a key strategy for reducing cancer risks and promoting overall well-being.

Learn more: https://www.nature.com/articles/s42255-025-01243-8