Encouraging people to eat more
dried fruit — without added sugar — could be an effective way to boost their intake of vital nutrients, researchers have concluded <a name=\'more\'></a> .
Low consumption of
fruit in the United States
and other countries is a major contributor to diet-related disease
and disability, according to a recent analysis.
Fruit is a good source of nutrients, such as fiber
and potassium, that many people lack in their diet. It also contains bioactive nutrients that provide extra
health benefits, including polyphenols
and carotenoids.
Research suggests that eating
fruit is associated with a lower risk of cardiovascular disease, cancer,
and type 2 diabetes.
However, only about 24% of females
and 14% of males in the U.S. eat the recommended daily amount of fruit, according to the National Cancer Institute.
Several factors might contribute to people’s low intake of fresh fruit, including limited availability, high cost,
and perishability.
Recommending that people eat more
dried fruit could be one solution.
Dried
fruit offers several advantages over fresh
fruit in terms of cost, availability,
and ease of storage
and transport. It could also replace more unhealthful snack food that is high in sugar, salt,
and saturated fat.
At the same time, however, there are concerns about overconsumption leading to excess calorie intake because
dried fruit is such an “energy dense” form of fruit.
Previous observational studies have found that eating
dried fruit is associated with
health benefits. However, the evidence is inconclusive because people who eat more
dried fruit may tend to have a more healthful
diet and lifestyle overall.
The new study by researchers at Pennsylvania (Penn) State University in University Park aimed to get around this difficulty by comparing days when particular participants reported eating
dried fruit with days when they ate none.
They found that people tended to consume more key nutrients on the days they ate
dried fruit, including dietary fiber
and potassium. However, they also consumed more calories.
“Dried
fruit can be a great choice for a nutritious snack, but consumers might want to be sure they’re choosing unsweetened versions without added sugar,” says Valerie Sullivan of Johns Hopkins Bloomberg School of Public Health in Baltimore, MD, who was a grad student at Penn State when she led the study.
“Portion sizes can also be tricky because a serving of
dried fruit is smaller than a serving of fresh since the water has been taken out. But the positive is that
dried fruit can help people potentially consume more
fruit because it’s portable, it’s shelf-stable,
and can even be cheaper.”
The research appears in the Journal of the Academy of Nutrition
and Dietetics.
For their analysis, the scientists drew on survey responses from 25,590 individuals who took part in the National Health
and Nutrition Examination Survey (NHANES) 2007–2016.
The respondents provided information about the food they had consumed in the past 24 hours (called “dietary recalls”).
Dried
fruit accounted for only 3.7% of all the
fruit consumed. However, a total of 1,233 participants reported consuming
dried fruit on one out of two dietary recalls, allowing the scientists to compare their intake on these days.
Data were also available on the participants’ health, including their body mass index (BMI), waist circumference,
and seated resting blood pressure.
Even after adjusting for demographic
and lifestyle factors, the participants who ate significant amounts of
dried fruit tended to have
better diets, a lower BMI, a smaller waist circumference,
and lower systolic blood pressure compared with those who did not.
When the researchers compared the days when a participant ate
dried fruit with those when they did not, they found that the average intake of total carbohydrate, dietary fiber, potassium,
and polyunsaturated fat was greater on the days they ate
dried fruit.
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Taken together, the findings suggest that people who ate
dried fruit expended more energy, compensating for the extra calories.
“In our study, people who consumed
dried fruits had a higher calorie intake but a lower BMI
and waist circumference, which suggests they were more physically active,” says co-author Penny Kris-Etherton, Evan Pugh University Professor of Nutritional Sciences at Penn State.
“So, when incorporating
dried fruits, pay attention to calories
and be sure to substitute out calories from low nutrient foods for
dried fruits to get the greatest benefit of eating
dried fruits,” she adds.
The researchers write that eating
dried fruit tended to increase total
fruit consumption, rather than replacing other forms of fruit. “Thus, increasing
dried fruit consumption might help Americans achieve greater
fruit intakes.”
The authors acknowledge that their study did not prove that eating
dried fruit improves health, only that there seems to be an association. People who are likely to eat
dried fruit may have
better health for other reasons, such as taking more exercise or leading less stressful lives.
In addition, they note that the survey relied on the participants’ recollection of what they had eaten over the past 24 hours
and their ability to estimate quantities accurately.
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