Study Links Mediterranean Diet to Reduced Diabetes Risk

Adopting a Mediterranean diet, which emphasizes fruits, whole grains, and healthy fats, could lower the likelihood of developing diabetes by nearly a third, especially when combined with some healthy lifestyle choices.

Published in the Annals of Internal Medicine, this study found that a Mediterranean diet paired with calorie management and regular physical activity can decrease the risk of type 2 diabetes (T2D) by about 31%. This research stemmed from the Plus Plus Plus trial, which tracked nearly 4,800 older adults in Spain at risk of diabetes over six years.

“In practical terms, incorporating calorie control and physical exercise into the Mediterranean diet helped prevent about three individuals out of every 100 from developing diabetes,” remarked Miguel Martinez Gonzalez, a professor at the University of Navarra in Spain.

“It provides a clear and tangible public health benefit,” he added.

“We are witnessing a global diabetes crisis,” stated Frank Hu, co-author of the study and professor at the Harvard Chan School of Public Health. Type 2 diabetes is rapidly rising, with nearly 16% of U.S. adults affected, according to the CDC. Experts suggest that small lifestyle modifications could significantly reduce new cases.

What Constitutes a Mediterranean Diet?

A typical Mediterranean diet includes:

• Abundant fruits and vegetables
• Whole grains
• Healthy fats, mainly from sources like olive oil and nuts
• Moderate portions of fish, dairy, and lean protein
• Little to no consumption of red meat

This dietary pattern is known to enhance heart health, promote better insulin sensitivity, and lower inflammation.

Lauren Harris-Pincus, a registered dietitian from New Jersey, emphasized the benefits of whole foods, noting that fiber-rich foods like fruits, vegetables, and whole grains support gut health while helping to ward off lifestyle-related diseases.

Study Overview

The research focused on around 4,800 overweight or obese individuals in Spain who were at risk for diabetes.

One half of the participants adhered to a Mediterranean diet while also reducing their daily caloric intake by about 600 calories, engaging in moderate exercise (think walking and light strength activities), and receiving professional guidance on weight loss.

Conversely, the other group followed a Mediterranean diet without including calorie restrictions, exercise advice, or support.

After six years, participants in the first group exhibited a 31% lower risk of developing diabetes. They also lost an average of 3.3 kilograms (nearly 7 pounds) and reduced their waist size by 3.6 cm (approximately 1.4 inches).

The control group, however, only managed to lose a modest 0.6 kilograms (around 1.3 pounds) with minimal changes to their waistline.

“The most effective approach to lower diabetes risk involves weight loss through a healthy, calorie-controlled diet combined with increased physical activity,” explained Dr. Jordi Salas-Salvadó of Robira University Vilgili in Spain.

Although Mediterranean diets are not the only dietary method for diabetes prevention, they present “sustainable and long-term options for weight loss.”

Salas-Salvadó noted previous trials had not specifically examined calorie reduction in the context of healthy, relatively high-fat diets.

Dr. Marc Siegel from NYU Langone Medical Center and a prominent medical analyst at Fox News, previously discussed the Mediterranean diet’s health benefits. He warned against saturated fats, sugar, and excess salt, which contribute to obesity and related health issues.

Considerations and Future Research

Salas-Salvadó acknowledged that factors like diet, physical activity levels, and weight management might obscure which elements have the strongest influence on diabetes risk.

Future investigations should include younger populations and diverse ethnic groups to provide a wider understanding of the diet’s effectiveness across various demographics.