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Bariatric surgery offers broad cancer protection regardless of sex or age. A study of nearly 800,000 people found those who had the procedure were about 20% less likely to develop obesity-related cancers. The benefits were consistent across genders and age groups, strengthening the case for equitable access to the surgery.
Bariatric surgery doesn't just help people lose weight — it may also significantly lower their cancer risk, and new research shows those benefits apply equally to men and women, young and old alike. A large population-based cohort study using data from nearly 800,000 people across Denmark, Finland, and Sweden found that those who underwent bariatric surgery had an overall ~20% lower risk of developing obesity-related cancers compared to those who didn't have the procedure.
The study, published in JAMA Surgery, examined 10 obesity-related malignancies including breast, colon, endometrial, kidney, liver, ovarian, pancreatic, and rectal cancers, esophageal adenocarcinoma, and multiple myeloma. Notably, the strongest protective effects were seen for liver cancer, endometrial cancer, and ovarian cancer. One unexpected finding: a higher pancreatic cancer risk among surgery recipients, particularly younger adults — though researchers caution this needs further investigation before any conclusions can be drawn.
By the Numbers:
Why it matters: Obesity is linked to 13 cancers accounting for ~40% of all U.S. cancer diagnoses. These findings reinforce that bariatric surgery carries meaningful long-term oncologic benefits and support the push for equitable access to the procedure for all clinically eligible patients.
