A new long-term study published in The BMJ has found important links between potato consumption and diabetes risk. The research shows that cooking methods play a key role in health outcomes. In particular, French fries were found to increase the risk of type 2 diabetes.
The study tracked more than 205,000 health professionals in the United States. Participants were observed for nearly 40 years. During this time, over 22,000 people developed type 2 diabetes. The condition affects how the body processes blood sugar and insulin.
Researchers found that eating French fries three times per week raised the risk of developing type 2 diabetes by about 20 percent. This increase was not seen in people who ate baked, boiled, or mashed potatoes.
The findings suggest that not all potato-based foods have the same health impact. While potatoes contain nutrients like vitamin C, potassium, and magnesium, frying them changes their nutritional profile. This is especially true for French fries, which are often high in fat and calories.
The study also examined food substitutions. Replacing French fries with whole grains such as oats, barley, or brown rice reduced diabetes risk by 19 percent. However, replacing potatoes with white rice showed the opposite effect and increased risk.
Researchers noted that dietary choices have a strong influence on long-term health. They emphasized that healthier preparation methods can make a significant difference. Baked and boiled potatoes remained safe options when eaten in moderation.
Although the study is observational and cannot prove direct causation, its large scale and long duration provide strong evidence. The findings highlight patterns seen across decades of dietary data.
Experts recommend limiting consumption of French fries and choosing less processed foods when possible. They also advise focusing on whole grains and balanced meals to reduce chronic disease risk.
The research supports existing nutritional guidelines that encourage healthier cooking methods. It suggests that small changes in diet can have long-term health benefits.
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Overall, the study reinforces that French fries may contribute to higher diabetes risk when consumed regularly. At the same time, it shows that potatoes can still be part of a healthy diet when prepared in healthier ways such as boiling or baking.
