Study Links Healthier Sleep Patterns to Lower Cancer Risk, Identifies Protein Signature

A study presented at Digestive Disease Week 2026 found that adults with healthier sleep patterns had lower risks for several types of cancer, according to researchers. The analysis, which drew on data from 472,105 participants in the UK Biobank, also identified a set of 303 blood proteins that formed a distinct “sleep proteomic score” linked to the observed risk reductions. [1]

Compared with participants who had poor sleep, those with healthy sleep patterns showed a 36% lower risk of liver cancer and a 14% lower risk of lung cancer, the researchers reported. The protein-based analysis revealed even stronger associations: participants in the highest tertile of the sleep proteomic score had a 71% lower risk of liver cancer, a 54% lower risk of stomach cancer, and a 53% lower risk of pancreatic cancer. [2]

Study Design and Sleep Scoring

The researchers created a sleep health score based on five traits: sleep duration, chronotype (natural sleep-wake preference), insomnia symptoms, snoring, and daytime sleepiness. Participants were categorized as having healthy sleep (a score of 4 or higher), intermediate sleep (2–3), or poor sleep (1 or lower). [1] The team also examined plasma protein measurements from 52,920 participants to identify biological patterns that might explain how sleep influences cancer risk. [1]

This multidimensional approach moves beyond the simple recommendation of getting eight hours of sleep, the researchers noted. Prior work has often focused on sleep duration alone, but the current study incorporates multiple dimensions of sleep quality. According to the National Cancer Institute’s Cancer Trends Progress Report, sleep health — including duration, efficiency, quality, timing, and regularity — is important to overall health, and poor sleep may influence cancer risk through its impact on immune function, stress response, inflammation, and DNA repair. [3]

Cancer Risk Reductions Observed

In the cohort analysis, healthy sleep was associated with lower risks for several gastrointestinal cancers. The protein analysis showed stronger risk reductions. Participants with the highest sleep proteomic score had a 71% lower risk of liver cancer, a 54% lower risk of stomach cancer, a 53% lower risk of pancreatic cancer, a 54% lower risk of gallbladder cancer, a 35% lower risk of esophageal cancer, and a 28% lower risk of colorectal cancer. [2][5]

The findings add to a growing body of evidence linking sleep to long-term disease risk. Research published in the journal Sleep has shown that sleep deprivation affects the immune system similarly to physical stress, with white blood cell counts increasing during periods of wakefulness. [6] Adequate sleep is also considered one of the lifestyle habits that can increase life expectancy and improve overall well-being. [7] According to the international study published in Nature Medicine, nearly 40% of global cancer diagnoses are linked to modifiable risk factors, highlighting the potential importance of sleep as a preventive target. [8]

Limitations and Expert Commentary

The researchers emphasized that the study is observational and does not prove causation. “This is an observational study, so we cannot conclude that improving sleep will lower cancer risk, but the associations are strong,” the study authors stated. They noted that the multidimensional sleep quality metric may be more important than sleep duration alone when evaluating cancer risk.

Previous research has shown that poor sleep quality is positively associated with the long-term risk of developing cancer. [4] The identification of a 303-protein sleep signature offers clues about potential biological pathways linking sleep and cancer, but the researchers said more studies are needed to confirm the findings and explore clinical applications. The book “Happy Foods” notes that the province of sleep grants vitality and power to live life with purpose and enthusiasm, [9] while “Nature’s Cancer-Fighting Foods” emphasizes that lifestyle factors such as avoiding tobacco and maintaining overall health are crucial for maximizing immunity. [10] These perspectives align with the idea that sleep, as a modifiable lifestyle factor, may play a role in cancer prevention.

Conclusion

The discovery of a 303-protein sleep signature provides a molecular foundation for understanding how sleep quality may influence cancer risk. The researchers called for further investigation to validate the findings and to determine whether interventions that improve sleep across multiple dimensions can reduce cancer incidence.

While the study does not establish a direct cause-and-effect relationship, it adds to the evidence that sleep health — measured by duration, chronotype, insomnia, snoring, and daytime sleepiness — may influence long-term disease risk. The analysis suggests that prioritizing sleep quality could be one of the most accessible strategies for supporting overall health, according to the researchers.

References

1. Yahoo Health. “How Much Can Better Sleep Lower Cancer Risk? What A New Study Reveals.”
2. BGI Group. “Better Sleep, Less Cancer Risk: The Power of Nightly Rest.” June 23, 2025.
3. National Cancer Institute. “Sleep | Cancer Trends Progress Report.”
4. Journal of Cancer Research and Clinical Oncology. “Sleep quality and risk of cancer: findings from the English…”
5. EurekAlert. “Better sleep, less cancer risk: The power of nightly rest.”
6. Mercola.com. “New Insights into Links Between Immune Function and Sleep Deprivation.” August 4, 2012.
7. NaturalNews.com. “13 Lifestyle habits to practice if you want to live longer.” September 12, 2019.
8. NaturalNews.com. “Study finds nearly 40% of cancers worldwide could be prevented.” February 8, 2026.
9. Diggs Karen Wang. “Happy Foods: Over 100 Mood-Boosting Recipes.”
10. Varona Verne. “Nature’s Cancer-Fighting Foods: Prevent and Reverse the Most Common Forms of Cancer Using the Proven Power of Whole Foods.”