Okay, confession time: I used to think potatoes were basically neutral. Not great, not terrible. Just... potatoes. But a new study published in The BMJ is making me reconsider everything I thought I knew about this humble vegetable.
The research tracked more than 205,000 U.S. health professionals for almost 40 years (that's right, FOUR DECADES of data). And what they found honestly surprised me.
The French Fry Problem
Here's the deal: eating three servings of French fries per week was associated with a 20% higher risk of developing type 2 diabetes. TWENTY PERCENT. That's significant, people.
But here's where it gets interesting. When those same three weekly servings were boiled, baked, or mashed potatoes? No significant increase in diabetes risk. Same potato, wildly different outcomes.
Why? The researchers point to how French fries are prepared. Deep frying adds oil, increases calorie density, and creates compounds that might affect insulin sensitivity. Plus, let's be real—when's the last time you ate just three French fries?
What You Swap Matters
Here's another finding that made me rethink my meal planning: what you replace potatoes with actually matters.
Swapping potatoes for whole grains? Associated with an 8% LOWER risk of type 2 diabetes. That's huge when you think about it.
But replacing potatoes with white rice? That was linked to a HIGHER diabetes risk. So the substitute food choice is just as important as the original food you're cutting back on.
Potatoes Aren't the Enemy (But Maybe Fries Are?)
I want to be balanced here because I'm not trying to make you swear off potatoes forever. Potatoes themselves contain fiber, vitamin C, and magnesium. They're not empty calories.
The editorial accompanying the study makes this point well: potatoes prepared healthily (baked, boiled, mashed) can absolutely fit into a healthy, environmentally sustainable diet. It's specifically the deep-fried preparation and what we tend to pair it with (fast food, heavy sauces, large portions) that seems to be the issue.
So What Do We Do With This?
Honestly? I think the takeaway isn't "never eat fries." It's more like "be mindful of what you're actually eating and why."
Three servings of fries per week is pretty specific—most of us probably don't track it that precisely. But if French fries are a regular part of your diet multiple times per week, maybe consider making them more of an occasional treat rather than a go-to side.
And when you're reaching for a potato-based side, consider baked or boiled versions instead. A nice baked potato with herbs? Way better than fries from a health standpoint.
The researchers themselves note this was an observational study (so it can't prove causation) and the participants were mostly health professionals of European ancestry. But with 40 years of data and over 200,000 people, these findings are worth taking seriously.
I'll be honest—this study won't stop me from occasionally enjoying fries. But it has made me more intentional about making them a treat rather than a staple. Sometimes that's what good science does: not to scare us, but to help us make small, informed choices that add up over time.
What do you think? Does this change how you'll approach fries and potatoes? Let me know in the comments—I genuinely want to hear your perspective!