Structured Mediterranean Diet Program Reduces Type 2 Diabetes Risk by 31% in Major Trial
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A large Spanish clinical trial has found that a structured program combining a calorie-reduced Mediterranean diet, increased physical activity, and professional support can significantly lower the risk of developing type 2 diabetes. The PREDIMED-Plus trial, the largest nutrition study in Europe, followed nearly 4,750 adults for six years. The intervention group lost more weight and saw a 31% reduction in diabetes risk compared to a control group following a traditional Mediterranean diet.
Facts First
- A structured lifestyle program reduced type 2 diabetes risk by 31% in a six-year trial of nearly 4,750 adults.
- The intervention combined a calorie-reduced Mediterranean diet, physical activity, and professional guidance, while the control group followed a traditional Mediterranean diet without these components.
- Participants in the program lost an average of 3.3 kg, compared to 0.6 kg in the control group, and saw greater reductions in waist circumference.
- The PREDIMED-Plus project is the largest nutrition trial conducted in Europe, involving over 200 researchers from 22 Spanish institutions.
- Researchers estimate the program prevented about three diabetes cases per 100 participants, a significant impact given the global prevalence of the disease.
What Happened
The PREDIMED-Plus trial significantly reduced the incidence of type 2 diabetes, according to results from a major Spanish clinical study. The trial involved 4,746 adults aged 55 to 75 who had overweight or obesity and metabolic syndrome, but no diabetes or cardiovascular disease at the start. Participants were followed for six years. The intervention group followed a calorie-reduced Mediterranean diet, engaged in moderate physical activity, and received professional weight loss guidance. The comparison group followed a traditional Mediterranean diet without calorie restriction or exercise advice. The study results were published in Annals of Internal Medicine.
Why this Matters to You
If you or someone you know is at risk for type 2 diabetes—a condition affecting over 38 million people in the United States and more than 65 million in Europe—this trial provides a concrete, evidence-based path for prevention. The structured program, which is based on accessible components like diet modification and walking, demonstrated a powerful protective effect. Adopting similar lifestyle changes may significantly lower your personal risk of developing a chronic disease. The findings are particularly relevant for older adults with overweight or obesity, as this was the population studied.
What's Next
The results from PREDIMED-Plus add to a growing body of research supporting the Mediterranean diet for health. The project, which concluded in 2024, builds on the original PREDIMED study. Further analysis of the trial's data is likely to continue, potentially informing public health guidelines and clinical practices for diabetes prevention. The program's success suggests it could be a model for scalable prevention strategies. Healthcare providers may increasingly recommend similar combined lifestyle interventions to patients at risk for metabolic diseases.