Early-life exposures and cancer risks in later life

At the BIPS Institute seminar on June 25, 2025, Edward Giovannucci discussed how influences in childhood, adolescence, and early adulthood can shape cancer risk in middle to late life. The focus was on the growing evidence that early stages of life are sensitive time windows for later cancer susceptibility.

The presentation classified cancer development as a multi-stage process that can span many years or even decades. Against this backdrop, it was explained that risk factors or protective influences can be effective long before a cancer diagnosis. For certain organs, susceptibility to cancer-causing processes may be increased, especially during childhood or adolescence.

Current findings were summarized that suggest that exposure in early life can influence cancer risk in adulthood. These findings underscore the importance of early life stages for understanding long-term disease development and for preventive approaches.

Edward Giovannucci is Professor of Nutrition and Epidemiology at the Harvard T.H. Chan School of Public Health.