French fries have long been a beloved side dish or snack for many, but a new study suggests they may be linked to an increased risk of developing type 2 diabetes (T2D). The study, conducted by researchers at Harvard T.H. Chan School of Public Health, tracked the diets of over 205,000 adults over several decades to explore the relationship between potato consumption and T2D risk.
The findings of the study, published in the BMJ, revealed that while French fries were associated with a 20% increased risk of T2D, other forms of potatoes such as baked, boiled, or mashed did not show the same correlation. In fact, the researchers found that swapping out any form of potato for whole grains could potentially lower the risk of developing T2D.
Lead author of the study, Seyed Mohammad Mousavi, emphasized the importance of looking beyond the simple question of whether potatoes are good or bad for health. Instead, the focus should be on how potatoes are prepared and what healthier alternatives can be incorporated into the diet.
The study followed participants enrolled in the Nurses’ Health Study, Nurses’ Health Study II, and Health Professionals Follow-up Study for over 30 years. Through regular dietary questionnaires, the researchers collected data on potato consumption, including French fries, as well as whole grain intake. Participants also reported any new diagnoses of T2D and other relevant health factors.
The results showed that consuming three servings of French fries per week was linked to a higher risk of T2D, while baked, boiled, or mashed potatoes did not have the same effect. Swapping potatoes for whole grains, such as whole grain pasta or bread, was associated with a 4% reduced risk of T2D, while replacing French fries with whole grains could bring the risk down by 19%.
The researchers also conducted meta-analyses using data from previous cohort studies to further support their findings. The results showed a consistent pattern of reduced T2D risk when potatoes were replaced with whole grains.
Corresponding author Walter Willett emphasized the public health implications of the study, highlighting the importance of making small dietary changes to reduce the risk of T2D. He stressed the need for policymakers to consider the preparation methods of foods and the potential benefits of replacing less healthy options with whole grains.
In conclusion, the study suggests that limiting potato consumption, especially French fries, and opting for healthier alternatives like whole grains could have a significant impact on reducing the risk of type 2 diabetes. By paying closer attention to dietary choices and making informed swaps, individuals can take proactive steps towards better health outcomes.
