Will GLP-1 Agonists Weaken the Links between Obesity and Cancer?

Donal J Brennan1,2, Lydia Lynch3,4

  • 1UCD Gynaecological Oncology Group, UCD School of Medicine, Mater Misericordiae University Hospital, Dublin, Ireland.

Cancer Discovery
|November 3, 2025
PubMed

Insights

Glucagon-like peptide 1 receptor agonists show promise in reducing cancer risk for individuals with obesity. Further research is needed to fully understand their mechanisms and potential in cancer prevention.

Area of Science:

  • Oncology
  • Endocrinology
  • Pharmacology

Background:

  • Obesity is a significant risk factor for various cancers.
  • Glucagon-like peptide 1 receptor (GLP-1R) agonists are established antiobesity medications.
  • Emerging evidence suggests a potential role for GLP-1R agonists in cancer risk reduction.

Purpose of the Study:

  • To review the current evidence on the impact of GLP-1R agonists on cancer risk in obesity.
  • To explore the underlying mechanisms linking GLP-1R agonism to cancer prevention.
  • To identify areas requiring further investigation in the field of antiobesity medicines and cancer.

Main Methods:

  • Systematic review of preclinical studies (in vitro and animal models).
  • Analysis of emerging clinical trial data.
  • Evaluation of human observational studies and clinical caveats.

Main Results:

  • Preclinical data and early clinical trials suggest GLP-1R agonists may reverse certain cancer risks associated with obesity.
  • Mechanisms may involve direct effects on cancer cells or indirect effects via metabolic improvements.
  • Caveats from human studies indicate a need for more comprehensive research.

Conclusions:

  • GLP-1R agonists represent a promising therapeutic avenue for mitigating cancer risk in obese populations.
  • Understanding the precise mechanisms and long-term effects is crucial for optimizing their use in cancer prevention.
  • Continued research is essential to fully elucidate the role of antiobesity medications in oncology.

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