French Fries Linked to Higher Diabetes Risk, But Not Other Potatoes

A large U.S. study published in The BMJ shows that French fries are associated with a significantly higher risk of type 2 diabetes, while boiled, baked, or mashed potatoes are not. Tracking over 205,000 health professionals across nearly 40 years, researchers found that eating three servings of French fries weekly raised diabetes risk by 20%, compared to just 5% for total potato intake. In contrast, similar amounts of non-fried potatoes showed no substantial risk increase.

Dietary swaps also influenced outcomes. Replacing potatoes with whole grains lowered diabetes risk, while substituting them with white rice increased risk. For example, replacing French fries with whole grains reduced risk by 19%.

Researchers highlight that preparation methods and replacement foods are critical in evaluating potatoes’ health impact. While French fries pose clear risks, other potato preparations can fit into a healthy, sustainable diet—though whole grains should remain the preferred carbohydrate source.

16-08-2025