05.01.14
Eating seven or more portions of fruit and vegetables a day may reduce risk of death at any point in time by 42% compared to eating less than one portion, according to a study from University College London (UCL) published in the Journal of Epidemiology & Community Health.
Researchers used the Health Survey for England to study the eating habits of 65,226 people representative of the English population between 2001 and 2013, and found that the more fruit and vegetables they ate, the less likely they were to die at any age. Eating seven or more portions reduced the specific risks of death by cancer and heart disease by 25% and 31%, respectively. The research also showed that vegetables have significantly higher health benefits than fruit.
This is the first study to link fruit and vegetable consumption with all-cause, cancer and heart disease deaths in a nationally-representative population, the first to quantify health benefits per portion and the first to identify the types of fruit and vegetables with the most benefit, according to researchers.
Compared to eating less than one portion of fruit and vegetables, the risk of death by any cause was reduced by 14% by eating 1-3 portions, 29% for 3-5 portions, 36% for 5-7 portions and 42% for 7 or more. These figures were adjusted for sex, age, cigarette smoking, social class, body mass index, education, physical activity and alcohol intake, and exclude deaths within a year of the food survey.
The study found that fresh vegetables had the strongest protective effect, with each daily portion reducing overall risk of death by 16%. Salad contributed to a 13% risk reduction per portion, and each portion of fresh fruit was associated with a smaller but still significant 4% reduction.
“We all know that eating fruit and vegetables is healthy, but the size of the effect is staggering,” said Dr. Oyinlola Oyebode of UCL’s Department of Epidemiology & Public Health, lead author of the study. “The clear message here is that the more fruit and vegetables you eat, the less likely you are to die at any age. Vegetables have a larger effect than fruit, but fruit still makes a real difference.”
The findings lend support to the Australian government’s “Go for 2 + 5” guidelines, which recommend eating two portions of fruit and five of vegetables. The U.K. Department of Health recommends “5 a day,” while “Fruit and Veggies – More Matters” is the key message in the U.S.
“Our study shows that people following Australia’s ‘Go for 2 + 5’ advice will reap huge health benefits,” said Dr. Oyebode. “However, people shouldn’t feel daunted by a big target like seven. Whatever your starting point, it is always worth eating more fruit and vegetables. In our study, even those eating one to three portions had a significantly lower risk than those eating less than one.”
The researchers found no evidence of significant benefit from fruit juice, and canned and frozen fruit appeared to increase risk of death by 17% per portion. The survey did not distinguish between canned and frozen fruit so this finding is difficult to interpret. Canned fruit products are almost four times more popular than frozen fruit in Europe, so it is likely that canned fruit dominated this effect.
“Most canned fruit contains high sugar levels and cheaper varieties are packed in syrup rather than fruit juice,” said Dr. Oyebode. “The negative health impacts of the sugar may well outweigh any benefits. Another possibility is that there are confounding factors that we could not control for, such as poor access to fresh groceries among people who have pre-existing health conditions, hectic lifestyles or who live in deprived areas.”
Researchers used the Health Survey for England to study the eating habits of 65,226 people representative of the English population between 2001 and 2013, and found that the more fruit and vegetables they ate, the less likely they were to die at any age. Eating seven or more portions reduced the specific risks of death by cancer and heart disease by 25% and 31%, respectively. The research also showed that vegetables have significantly higher health benefits than fruit.
This is the first study to link fruit and vegetable consumption with all-cause, cancer and heart disease deaths in a nationally-representative population, the first to quantify health benefits per portion and the first to identify the types of fruit and vegetables with the most benefit, according to researchers.
Compared to eating less than one portion of fruit and vegetables, the risk of death by any cause was reduced by 14% by eating 1-3 portions, 29% for 3-5 portions, 36% for 5-7 portions and 42% for 7 or more. These figures were adjusted for sex, age, cigarette smoking, social class, body mass index, education, physical activity and alcohol intake, and exclude deaths within a year of the food survey.
The study found that fresh vegetables had the strongest protective effect, with each daily portion reducing overall risk of death by 16%. Salad contributed to a 13% risk reduction per portion, and each portion of fresh fruit was associated with a smaller but still significant 4% reduction.
“We all know that eating fruit and vegetables is healthy, but the size of the effect is staggering,” said Dr. Oyinlola Oyebode of UCL’s Department of Epidemiology & Public Health, lead author of the study. “The clear message here is that the more fruit and vegetables you eat, the less likely you are to die at any age. Vegetables have a larger effect than fruit, but fruit still makes a real difference.”
The findings lend support to the Australian government’s “Go for 2 + 5” guidelines, which recommend eating two portions of fruit and five of vegetables. The U.K. Department of Health recommends “5 a day,” while “Fruit and Veggies – More Matters” is the key message in the U.S.
“Our study shows that people following Australia’s ‘Go for 2 + 5’ advice will reap huge health benefits,” said Dr. Oyebode. “However, people shouldn’t feel daunted by a big target like seven. Whatever your starting point, it is always worth eating more fruit and vegetables. In our study, even those eating one to three portions had a significantly lower risk than those eating less than one.”
The researchers found no evidence of significant benefit from fruit juice, and canned and frozen fruit appeared to increase risk of death by 17% per portion. The survey did not distinguish between canned and frozen fruit so this finding is difficult to interpret. Canned fruit products are almost four times more popular than frozen fruit in Europe, so it is likely that canned fruit dominated this effect.
“Most canned fruit contains high sugar levels and cheaper varieties are packed in syrup rather than fruit juice,” said Dr. Oyebode. “The negative health impacts of the sugar may well outweigh any benefits. Another possibility is that there are confounding factors that we could not control for, such as poor access to fresh groceries among people who have pre-existing health conditions, hectic lifestyles or who live in deprived areas.”
