You Should Probably Avoid Frying White Potatoes



By Joy Stephenson-Laws, JD, Founder


Potatoes are the most consumed vegetable. Yes, they are technically a vegetable but are more nutritionally similar to starches.

Reportedly, Americans eat an average of 115.6 pounds of white potatoes per year. And it’s estimated that two-thirds of these white potatoes we are consuming are prepared as French fries, potato chips and other frozen and processed potato products.

In other words, many Americans are consuming white potatoes as junk food.

Obviously, this is not a good thing!

A recent study, published in The American Journal of Clinical Nutrition, found evidence which suggests that fried potato consumption is associated with elevated mortality.

The study included 4,400 participants (2,551 women and 1,849 men) in the age range 45-79. Researchers took inventory of the participants’ potato consumption (including fried and unfried potatoes) through a food questionnaire.

More specifically, “Potato consumption was assessed through 2 specific questions. The first question considered the consumption of French fries, fried potatoes, or hash browns. The second question considered the consumption of white unfried potatoes, including boiled, baked, and mashed potatoes and potato salad,” according to the study report.

Why were sweet potatoes not included in this study?

Sweet potatoes have a much different nutritional composition than white potatoes. For example, “Despite their similar classification by the USDA, sweet potatoes and white potatoes have a number of nutritional differences, with sweet potatoes offering greater nutritional benefits.” (You can read about the nutritional benefits of sweet potatoes here).

Regarding consumption of white potatoes, participants were categorized as follows:

  • Less than or equal to one time a month
  • Two to three times a month
  • One time a week
  • Two times a week
  • More than or equal to three times a week

Overall, most of the participants consumed potatoes two to three times a month. The researchers followed up with the participants after eight years of taking note of their white potato consumption.

The results?

During the eight-year follow up, 236 of the participants had died. Also know that the researchers considered possible variables that could have had an influence such as weekly alcohol consumption, physical activity, total energy intake, BMI, adherence to a Meditterranean diet, ethnicity, smoking habits and more.

Participants who overall ate the most white potatoes did not necessarily have the highest risk of mortality, however, participants who consumed fried potatoes two to three times a week or more were at an increased risk of mortality.

So perhaps it is important to understand that it is not only important to focus on what you eat but also how you prepare the food you eat.

“The use of fried potatoes is probably associated with a higher risk of diabetes and other comorbidities for several reasons, such as cooking with trans fats,” the study report says.

Trans fats are fairly easy to use, because they last a long time and are inexpensive to produce. Reportedly, “many restaurants and fast-food outlets use trans fats to deep-fry foods because oils with trans fats can be used many times in commercial fryers. Several countries (e.g., Denmark, Switzerland, and Canada) and jurisdictions (California, New York City, Baltimore, and Montgomery County, MD) have reduced or restricted the use of trans fats in food service establishments.”  

Unfortunately, trans fats raise your bad cholesterol levels and lower your good cholesterol levels. So eating trans fats increases your risk of developing type 2 diabetes, heart disease and stroke.

Some other foods that contain trans fats include donuts, cookies, frozen pizza and biscuits. Small amounts of trans fats are naturally found in some meats and dairy products.

White potatoes in general (even ones that are not fried) tend to get a bad reputation because “[p]otatoes are rich in starch and have a high glycemic index, which has been associated with an increased risk of developing obesity, diabetes, and cardiovascular disease (CVD),” according to the study report.

“However, compared with other common carbohydrate sources, potatoes have a low energy density because of their high water content. In addition, potatoes provide other important micronutrients, which are all associated with a decreased risk of morbidity and mortality. Therefore, potatoes represent a contradictory food because they contain both macro- and micronutrients with possible beneficial and harmful effects on health.”

So clearly we have to be mindful of how we prepare our  foods, even if they are vegetables. Fried foods may taste delicious, but consuming too much of fried foods may be damaging to  our health. Moderation is key. When prepared in a healthy manner, white potatoes may have great nutritional benefits, but this does not mean that you should eat them daily or even weekly.

Consult a competent healthcare professional about your diet. There is no one-size-fits-all approach when it comes to good nutrition.


Enjoy your healthy life!


The pH professional health care team includes recognized experts from a variety of health care and related disciplines, including physicians, attorneys, nutritionists, nurses and certified fitness instructors. This team also includes the members of the pH Medical Advisory Board, which constantly monitors all pH programs, products and services. To learn more about the pH Medical Advisory Board, click here.


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