A new study suggests that GLP-1 medications, including Ozempic and Wegovy, may help lower the risk of certain obesity-related cancers. The research, published in the journal JAMA Network Open, found that people with type 2 diabetes who were being treated with these drugs had a significantly lower risk of developing 10 out of 13 obesity-associated cancers compared to those taking insulin. The reduced risk was significant for gallbladder cancer, meningioma, pancreatic cancer, hepatocellular carcinoma (a kind of liver cancer), ovarian cancer, colorectal cancer, multiple myeloma, esophageal cancer, and endometrial cancer. The study also found that GLP-1 treatment was not associated with a reduced risk of postmenopausal breast cancer or stomach or thyroid cancers. However, it is important to note that the findings do not prove causation and more research is needed to understand how reduced cancer risk may relate to the scale of weight loss.
GLP-1 medications interact with systems related to insulin production and have been shown in other trials to compare favorably with intensive lifestyle intervention and metabolic-bariatric surgery for reducing cancer risk. However, they were not associated with a reduced risk of kidney cancer when compared to metformin treatment.
Obesity is a significant risk factor for at least 13 types of cancer, and the longer a person is overweight or obese, the higher their risk. About 40% of new cancer diagnoses are associated with excess weight. The CDC reports that in 2021, there were about 170 new diagnoses for every 100,000 people.
Excess weight can cause changes in the body such as long-lasting inflammation and higher than normal levels of insulin, insulin-like growth factor and sex hormones that can contribute to cancer. GLP-1 medications interact with these systems and may help reduce cancer risk by lowering inflammation, improving insulin sensitivity, and reducing the production of certain growth factors.
The study authors note that further preclinical and clinical studies are needed to confirm the potential benefits of GLP-1RAs for cancer prevention in high-risk populations.