French Fries Linked to Higher Type 2 Diabetes Risk, Diet Substitutions Matter

A BMJ study following over 205,000 U.S. health professionals for nearly 40 years found that three weekly servings of French fries are tied to a 20% higher risk of developing type 2 diabetes, while the same amount of boiled, baked, or mashed potatoes showed no significant increase. Replacing three weekly servings of potatoes with whole grains reduced risk by about 8%, replacing baked/boiled/mashed potatoes with whole grains reduced risk by about 4%, and replacing French fries with whole grains reduced risk by about 19%. Replacing potatoes with white rice increased diabetes risk. Because the study is observational, it cannot prove causation and may not generalize to all populations. The findings support favoring whole grains and moderating fried potato consumption as part of diabetes prevention.