In defense of French fries

Robert H. Shmerling, MD

Senior Faculty Editor, Harvard Health Publishing

I thought it must be a slow news day. The New York Times ran a story about French fries with a conclusion that shocked no one: French fries aren’t a particularly healthy food choice. But is this anything new? And just how bad are they?

Could French fries actually kill you?

Maybe. At least, that’s the implication of the study that triggered the latest news coverage. Researchers found that regular consumers of French fries don’t live as long as those who eat them less often.

Of course, I immediately wondered: is it really the French fries? What else do big-time consumers of French fries do that might affect their longevity? Are they couch potatoes (or should I say couch fries)? Do they drink too much? I’m guessing their other food choices might not be the best. Maybe it’s the Big Macs, cheesecake, and smoking that’s responsible more than the fries? So, let’s take a closer look at the study.

More French fries, more death

In June 2017, researchers publishing in the American Journal of Clinical Nutrition described a study of 4,400 older adults monitored over an eight-year period that found:

  • Higher potato consumption (including fried and non-fried potatoes) was not associated with a higher risk of death.
  • Eating French fries more than twice a week was associated with a more than doubled risk of death.
  • The findings held up even after accounting for obesity, physical activity, smoking, and alcohol consumption (as reported by study subjects during study enrollment).

The authors had some theories on why French fries might raise the risk of death, including:

  • French fries have a lot of fat and salt that could raise the risk of cardiovascular disease. During the years of this study, trans fat (a particularly unhealthy type of fat) had not yet been banned from the US market.
  • High consumption of French fries could increase the risk of future high blood pressure, diabetes, or obesity (which are known risk factors for cardiovascular disease and other health problems),
  • High consumers of French fries might also be high consumers of other high-fat or high-salt foods, sweetened beverages, and red meat. So, as suspected, this study does not prove that the higher rates of death among higher consumers of French fries were actually due to the fries.

But are French Fries really a “death food”?

This brings us to the real question raised by this new research: must you swear off French fries forever? I say no. Here’s why:

  • The higher risk of death was noted among those who ate French fries more than twice a week. Eating them once a week or less would likely have a negligible effect on your health.
  • Portion size matters. This study didn’t provide details of how many fries study subjects ate at one sitting, but an “official” serving is just 10 to 15 individual fries (130–150 calories). Most fast food establishments serve three to four times that amount! Stick with one serving, or share a restaurant serving with a couple of meal mates.
  • Homemade “baked fries” using minimal olive or canola oil aren’t French fries, but they’re close… and much healthier.

The coverage of this new research (“A weapon of dietary destruction!”) made it sound as though having fries with your meal is a death sentence. But let’s not overstate the “danger” of French fries. And let’s also face this irrefutable fact: they’re too good to give up.

But, if we think of them as an occasional indulgence and understand what a single portion of French fries looks like, there’s no reason to eliminate them from your diet. And they go great with a salad.

Follow me on Twitter @RobShmerling


  1. Buddy4 Study

    The study was just a correlation, of course, which means that we can’t assume that the French fries actually caused the death per se. The researchers tried to control for a number of potentially confounding variables, like weight and activity level, which helps reduce the amount of noise in the study, but there could certainly be other factors at play, which explain the connection. (It would be unethical to do a randomized control trial on it, since you can’t ethically ask participants to increase their French fry consumption and then measure their death risk.)

  2. Kate

    The best fries other than chip-wagon fresh cuts, are made from a recipe “In the Kitchen with Rosie: Oprah’s Favorite Recipes” Make them wedge or matchstick. DELICIOUS and NUTRITIOUS!

  3. Daniel McGee

    Mine too Macs

  4. suresh kumar

    Are roasted and fried potato not good food.

  5. Sharon RN

  6. Jan Jacobs

    Good to know! I only eat fries about 6 times a year, but I always have the large bag…great indulgence…but I also add extra salt. So that’s why only 6 times a year. My favorite of course are McDonalds fries 🍟

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