New research suggests that a diet already known for supporting heart and brain health may also help protect against certain cancers — and the benefit goes beyond weight control.
Researchers analyzed data from more than 450,000 people in a study published in JAMA Network Open. They found that those who followed the Mediterranean diet most closely had a lower risk of obesity-related cancers.
Importantly, this effect was not explained by body weight or fat distribution. That means the diet appears to work at a cellular level, not just by helping people stay slim.
Beyond weight
Obesity raises cancer risk by promoting inflammation, hormone imbalances, and oxidative stress. But the study showed that the Mediterranean diet’s protective effect remained even after accounting for weight.
Researchers pointed to specific foods in the diet — extra-virgin olive oil, nuts, fatty fish, legumes, and colorful vegetables — as likely working together to reduce chronic inflammation and oxidative damage. These processes are early drivers of cancer and aging. The diet may help cells stay healthier for longer, rather than simply preventing weight gain.
How to eat like the longest-living people
The authors note that people do not need to completely change their eating habits to get these benefits. Small, consistent changes can help:
Use olive oil generously. Aim for 2 to 4 tablespoons daily, preferably without heating it, to preserve its antioxidants.
Eat nuts. A handful of almonds or walnuts supports heart and cellular health.
Include fatty fish. Salmon, sardines, and anchovies provide omega-3s that calm inflammation.
Fill the plate with colorful produce. Tomatoes, spinach, and berries contain phytonutrients that help protect DNA.
Choose fruit instead of sweets. Natural sugars come with fiber and antioxidants, unlike refined sugar.
The study adds to a growing body of evidence showing that moderate adherence to the Mediterranean diet can reduce cancer risk without requiring strict rules. Every drizzle of olive oil or serving of vegetables is a step toward better health.
