Young Adult Cancer Rates Rising Globally, Corn Belt

Multiple studies show cancer incidence is rising among young adults both internationally and in parts of the United States; a 42-country analysis found cancers in people aged 20–49 rising about four times faster than in older adults, with colorectal cancer increasing especially rapidly (higher in young adults in 69% of countries). U.S. data show the six major Corn Belt states have had cancer rates among ages 15–49 about 5% above the national average since 2015, and Iowa now ranks fifth for adults under 50. The trend includes notable rises in colorectal, skin, kidney cancers and aggressive breast cancers in women under 40, producing harms such as delayed diagnoses, more aggressive disease in younger patients, and long-term life disruptions. Researchers say causes are complex and contested, pointing to rising obesity and lifestyle changes, expanded screening and detection differences, and environmental exposures in agricultural regions (long-term fertilizer and pesticide use, nitrates in groundwater, and radon); the EPA currently maintains glyphosate is “not likely to be carcinogenic” and plans another review in 2026. Policymakers, researchers and clinicians are responding with new funding and investigations (for example Iowa’s $1 million study), litigation and regulatory scrutiny of agrochemicals, and heightened calls for awareness, early detection and expanded adolescent/young-adult oncology resources and clinics.