UPF health impacts
Overweight and obesity
In 2020, an estimated 2.6 billion people worldwide were either overweight or obese (BMI >30kg/m2), and this figure is projected to rise to higher than 4 billion by 2035.10 Individuals who consume substantial amounts of UPFs have higher odds of obesity than those who consume lesser amounts.
In a U.S. study of 20 inpatient adults given a diet high in either UPFs or unprocessed foods for 14 days, participants on the UPF diet gained an average of 0.9 kg (+/-0.3 kg) in weight, while participants eating an unprocessed diet lost an average of 0.9 kg (+/-0.3 kg). (Those on the UPF diet also consumed on average 508 kcal more per day.) Sodium intake also was significantly higher for those eating UPFs: 5.8 g/day versus 4.6 g/day in the unprocessed foods diet.11
A U.S. study of 9,640 adults ages 20 to 59 found that adults in the highest quintile of UPF consumption (>72.1% energy intake) had 1.6 times higher total body fat percentage compared to those in the lowest quintile (<39.4% energy intake).12
Cancer
Global cancer incidence continues to rise. Cases are projected to increase from 19.3 million in 2020 to 30.2 million by 2040.13 Research shows that about half of cancer cases could potentially be avoided through diet modification and lower UPF consumption.14
In a study of 20,000 UK Biobank participants ages 40 to 69, mean UPF consumption was 22.9% of the diet. Participants with the highest consumption percentage compared to the lowest showed a 7% higher risk of any cancer, a 25% higher risk for lung cancer, a 52% higher risk for brain cancer, and a 63% higher risk for diffuse large B-cell lymphoma.14
Cardiovascular disease (CVD)
CVD is the most common cause of death both worldwide and in the U.S., causing an estimated 17.9 million deaths worldwide and 840,000 U.S. deaths in 2016.8
Dietary factors play a crucial role in the development and prevention of CVD. High UPF consumption has been found to increase risk of high blood pressure, CVD, myocardial infarction, and stroke. In Europe in 2015, 56% of CVD deaths in men and 48% in women were related to dietary factors alone.2 In fact, a healthy and balanced diet can reduce risk of CVD by up to 50%.15
- A meta-analysis of 10 studies by the Air Force Medical University in China of 325,000 individuals found that, compared with the lowest UPF consumption category, those who ate the highest amount of UPFs had a 24% higher risk of cardiovascular conditions such as myocardial infarction, stroke, and angina.5
- The NutriNet-Sant茅 study in France, composed of 105,159 participants, found that UPF consumption was associated with a higher risk of overall CVD (HR 1.12), coronary heart disease (HR 1.13), and cerebrovascular disease (HR 1.11).2
Mental health
As UPFs are generally high in carbohydrates, saturated fat, and calories, and low in protein and fiber, the risk of inflammation and oxidative stress may be increased. They are also low in vitamins B12, D, E, and niacin (B6), as well as in a range of minerals (copper, iron, phosphorus, magnesium, selenium, and zinc) that are considered essential for optimal mental health16 and have been associated with alterations in the gut microbiome that are linked to the onset of depression.
- A large Australian study of more than 23,000 people found that individuals with the highest percentage intake of UPFs (37% of the diet) had increased odds of elevated psychological distress compared to those with the lowest intake (15.9% of the diet) (OR 1.23).16
- In a study of more than 31,000 women ages 42 to 62, those in the highest quintile of UPF consumption had a 49% increased risk of depression compared to those in the lowest quintile.17
Impact on all-cause and cause-specific mortality
Many studies indicate that high UPF consumption may be associated with early all-cause and cause-specific mortality. Individuals whose diets have higher percentages of UPFs are also more likely to smoke, have family histories of non-communicable diseases, and lead sedentary lifestyles, all of which may increase early mortality risk.
The Seguimiento Universidad De Navarra (SUN) prospective cohort study in Spain, comprising 19,899 participants from 1999 to 2014, found that those with the highest quartile of UPF consumption had higher all-cause mortality (HR 1.62) than those in the lowest quartile. For each additional serving of UPF, all-cause mortality increased by 18%.18
A study of UK Biobank participants investigated the relationship between all-cause mortality and consumption of UPFs. Individuals in the highest quartile of consumption compared to the lowest had significantly higher all-cause mortality risk (HR 1.22).15
Analysis from the Prospective Urban Rural Epidemiology (PURE) study of 138,076 participants between ages 35 and 70 across 21 countries found that a diet high in UPFs was associated with a 28% increased risk of all-cause mortality, a 17% increased risk of cardiovascular mortality, and a 32% increased risk of non-cardiovascular mortality compared to those with a low intake of UPFs.9 In a multi-national cohort study by the European Prospective Investigation into Cancer and Nutrition (EPIC) of more than 250,000 participants, higher UPF consumption was associated with increased risk of cancer and cardiometabolic diseases, most notably for animal-based products and for artificially and sugar-sweetened drinks as well (HR 1.09).19
Conclusions
Consumption of UPFs has risen significantly in recent decades, likely contributing to increased global incidence of cancer, CVD, mental health disorders, and overweight and obesity. These increases in non-communicable diseases could be directly impacting insurers, which may face rising claims costs and subsequently may need to adjust the cost of protection. UPFs are one of several novel factors of which insurers should be aware that are changing incidence rates of many diseases, and 鈥 over time 鈥 may alter the course of human health and longevity.