The Power of Lifestyle: Diet and Exercise Outperform Medication in Preventing Chronic Disease

When it comes to warding off chronic illness, a healthy diet and regular exercise may be far more powerful than reaching for a prescription pad. According to new research published in the Journal of the American Medical Association, fundamental lifestyle changes significantly outperform popular diabetes medications in protecting long-term health.

A Two-Decade Investigation

Researchers tracked more than 1,100 adults who originally participated in the landmark Diabetes Prevention Program launched in the 1990s. Over the course of 21 years, the team monitored the participants for the development of 15 different chronic conditions, including heart disease, kidney disease, cancer, arthritis, and dementia.

During the trial, participants were randomly divided into three groups: a lifestyle intervention group (focused on nutritional changes and moderate-intensity exercise), a medication group taking the diabetes drug metformin, and a control group taking a placebo.

The Superiority of Diet and Exercise

The results of the 21-year follow-up were striking. Participants assigned to the lifestyle intervention group were roughly 20% less likely to develop multiple chronic diseases compared to those taking the placebo. Interestingly, the group taking metformin did not experience these same broad, long-term protective benefits.

Moving Beyond the “Quick Fix”

Dr. Shirin Jaggi, an endocrinologist at Northwell North Shore University Hospital and Long Island Jewish Medical Center in New York, notes that these findings prove the benefits of healthy habits extend far beyond simple diabetes prevention.

“For me to be able to speak to my patients and tell them that it’s not just a pill that I need to give to you, your lifestyle choices are going to make a big difference for your present and not just your future, I think that’s amazing,” Jaggi said.

To achieve these lasting benefits, Dr. Jaggi advises against extreme fad diets or drastic overnight routines. Instead, she recommends adopting a sustainable, balanced diet and making gradual lifestyle changes, starting with manageable exercise goals and building momentum over time.

Source: US News & World Report | June 16 2026