Harvard study reveals not all potatoes are equal in link with diabetes

A recent Harvard study found that the risk of developing type 2 diabetes varies depending on how potatoes are prepared, with French fries linked to increased risk while baked, boiled, and mashed potatoes are not significantly associated.

Potatoes may increase risk of type 2 diabetes—depending on their preparation - Harvard T.H. Chan School of Public Health
Source: hsph.harvard.edu

Potatoes may increase risk of type 2 diabetes—depending on their preparation - Harvard T.H. Chan School of Public Health
Source: hsph.harvard.edu

At a glance

Key Evidence

Verified August 7, 2025

The Harvard study reported a 20% increased risk of type 2 diabetes linked specifically to French fries consumption.
Baked, boiled, and mashed potatoes were not significantly associated with increased diabetes risk.
The research emphasizes that carbohydrate sources and preparation methods critically affect health outcomes.masslive.com hsph.harvard.edu upi.com

The reporting

What the Evidence Shows

The claim that "not all potatoes are equal in link with diabetes" is supported by recent research conducted by Harvard University. The study highlights that the method of potato preparation plays a crucial role in influencing the risk of type 2 diabetes. Specifically:

French fries consumption was associated with a roughly 20% increased risk of developing type 2 diabetes.

In contrast, other common preparations such as baked, boiled, or mashed potatoes showed no significant association with increased diabetes risk.

This distinction underscores the importance of food preparation methods in dietary guidelines and diabetes risk management. The findings suggest that it is not the potato itself but how it is cooked, particularly frying, that may contribute to higher diabetes risk. This aligns with broader nutritional understanding that fried foods often carry additional health risks due to added fats and processing.

Therefore, the statement accurately reflects current scientific evidence from a reputable source and provides nuanced insight into dietary impacts on diabetes.

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