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Even if you stick to a healthy, natural diet, chances are you still eat processed foods.
Technically, many of the healthy foods we eat are processed but its not what you think. For example, if you have a Mason jar full of organic dried beans, you have processed food in your pantry. Frozen vegetables are processed, even if you picked them from your garden, blanched them and put them in the freezer. The moment you blanched them, you processed them. Peanuts-only peanut butter, steel cut oats and organic extra virgin olive oil are all processed, and most people would consider those foods part of a healthy diet.
When we say we shouldnt eat processed foods, what we really mean is ultra-processed foods. Theres a difference between the two, and studies say Americans are eating way more ultra-processed than we should, leading to excessive (and often unrealized) sugar consumption with some unfortunate health results.
What are ultra-processed foods?
Ultra-processed foods, according to a 2016 study published in the medical journal BMJ Open, are "industrial formulations which, besides salt, sugar, oils and fats, include substances not used in culinary preparations, in particular additives used to imitate sensorial qualities of minimally processed foods and their culinary preparations."
Lets take a practical look at what that means. I keep whole-grain naan flatbread in my freezer because it rounds out quick, healthy meals in which I also use up a variety of leftovers.
If I made homemade naan, I would make it with processed ingredients like flour, yeast, milk, butter and salt. But I buy naan from the grocery store, and while the brand I buy contains mostly the type of ingredients of a homemade version, it also includes the additive dextrose, a type of sugar.
Sugar in processed vs. ultra-processed foods
Researchers found those who eat a diet thats heavy in ultra-processed foods are getting a lot of added preservatives in their diet in addition to an overabundance of sugar. In ultra-processed foods, sugar makes up 21.1% of the calories, on average. In processed foods, sugar makes up only 2.4% of the calories, on average. Keep in mind that the USDA dietary guidelines say that sugar should make up only 10% of your daily calories.
If we ate ultra-processed foods only occasionally, it wouldnt be as big of a problem. However, researchers found that almost 58% of the calories Americans consume are from ultra-processed foods.
If youre eating an average American diet, chances are youre eating too many ultra-processed foods and those foods are adding more sugar to your diet than you would expect. You dont expect, for instance, that a frozen lasagna will contain two teaspoons of sugar per serving. Neither would you expect that a snack-pack portion of applesauce contains six teaspoons of sugar when homemade applesauce doesnt need any added sugars to be sweet and delicious.
If youre looking to decrease the sugar in your diet, decreasing the ultra-processed foods you eat, even the ones that you wouldnt normally associate with sugar, can help you achieve your goal.
Health risks
In a recent study conducted in France, researchers found that people who increased their daily intake of ultra-processed food by 10% faced a 14% higher risk of early death. For the research, 44,551 French adults 45 years and older offered information on their diet, health and physical activity for two years. Ultra-processed foods accounted for about 14% of the weight of total food consumed and about 29% of total calorie intake.
Ultra-processed food consumption was associated with younger age, lower income, lower education level, living alone, higher body mass index and lower activity level. The study was published in JAMA Internal Medicine.
The same authors published a 2018 study that found people who increased their daily intake of ultra-processed food by 10% increased their risk of developing overall cancer by 12% and breast cancer by 11%. While the study didnt identify the exact reason why ultra-processed foods causes a higher risk of cancer, researchers did have several theories.
One theory is that the foods contain high levels of sodium, sugar and fat. Those ingredients have been linked to obesity, which can also lead to a greater risk of cancer. A second theory is that some ultra-processed foods contain certain additives that have carcinogenic properties. For instance, titanium dioxide is used as a whitening agent or in food packaging to improve foods texture. Studies have shown that the additive could cause lesions on the colon or gastrointestinal inflammation.
Also, another theory is high temperatures used to process the food can create newly formed contaminants. Finally, BPA (Bisphenol A) is commonly used in food packaging and can leech into the food.
Interestingly, a 2019 study conducted by researchers at the National Institutes of Health, found that eating a diet made up of ultra-processed foods prompts people to overeat and thereby gain weight. Researchers found that volunteers on an ultra-processed diet ate about 508 more calories each day and ended up gaining an average of two pounds in two weeks. Study participants who ate whole or minimally processed foods lost about two pounds during that same period.
While further studies are needed to know the exact reasons why ultra-processed foods can have such an impact on health, its safe to say that the consequences of eating them outweigh the benefits.
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