Women eating a daily serving of fried fish or shellfish had a 7% higher risk of death.
The authors emphasize that limiting the consumption of fried foods, in particular fried chicken and fish, could be beneficial to public health.
"We know that eating fried foods is very common in the United States and around the world, and unfortunately we know very little about the long-term health effects of eating fried foods," said the lead author of the study. Wei Bao. an assistant professor of epidemiology at the University of Iowa.
"Making a Good Thing a Harmful Thing"
 Bao's team studied the dietary habits of nearly 107,000 women between the ages of 50 and 79 from 40 clinics in the United States between 1993 and 1998. They were followed for an average of 18 years.
When they enrolled for the study, the women completed a questionnaire on the frequency of food and asked about the consumption and portion size of 122 foods, including fried chicken and fish, as well as French fries, tortillas and tacos.
Other Factors In the team's calculations, mortality rates such as educational attainment, income, total energy expenditure, and overall nutrition quality were taken into account.
Women who consumed one or more portions of fried food daily had an 8% higher risk of death for all reasons and cardiac death compared to those who did not eat had fried food. However, this finding was not statistically significant, the study added.
In particular, the eating of roast chicken had a 13% higher risk of death and a 12% higher risk of cardiac death. For fried fish, the increase in risk of death and cardiac death was 7% and 13%, respectively.
However, there was no association between total consumption or specific consumption of fried foods and cancer deaths, the study found.
The connection of Fried Food to health outcomes is the combined effect of the food itself and the frying process, Bao explained.
Fish can be helpful in cardiovascular disease, so he expects a lower correlation between fried fish and mortality than in the study. "When you fry fish, it can turn out to be a good thing that is harmful.
" Although there is a risk of eating fried food in terms of mortality, the risk is low with low frequency, "Bao added  Bao believes the study can be applied to American men as well. Previous studies on the health effects of fried foods did not show gender differences, according to the study.
The study found that there are a number of reasons According to the authors, these foods could be ultra-processed, which means they have a high sodium content, which can lead to an increased risk of dying.
used to make the Sp to cook iron, at what temperature or with what cooking methods. These also influence the relationship between fried foods and the risk of death.
In the United States, people more often eat fried food in fast food restaurants, the study said. This is important, Bao explained, because when people fry food at home, they are less likely to reuse oil, creating harmful products in the oil that are absorbed into the food.
Bao believes that controlling the portions and reducing the frequency with which we indulge in fried foods can be steps to protect our health.
Not applicable everywhere
and its association with food habits from different parts of the world, "said Jo Ann Carson, scientific volunteer and former chair of the American Heart Association's Nutrition Committee." Earlier research has shown us that the traditional southern diet known for fried foods is not ideal for optimal heart health and this study helps to explain why this is so, "she said, adding that nearly 80% of cardiac events can occur however, heart disease is the number one cause of death for women.
However, Bao said the findings of the new study "can not be generalized globally." People around the world may have different frying practices, such as fried food at home or outdoors, or or or could versch use different oils.
In Spain Research on the relationship between the consumption of fried foods and the mortality of all The causes showed no link between the two, because the population used olive oil, he added.
Bridget Benelam, a nutritionist from the British Nutrition Foundation who was not involved in the research, believes that there could be a number of reasons why roasting chicken and fish could be bad for our health.
Lynne Garton, dietician of the charity Heart UK said the study was "interesting", but warned against drawing firm conclusions. The women who ate more deep-fried food were generally less healthy, which means that there are "a variety of factors" that could have led to the results, she explained.
In addition, their "diet was evaluated at the beginning of the study, assuming that the same diet was followed for the entire 18 years of follow-up".
Regular eating of fried foods, especially when eating, means that people eat more calories, fat and salt, and these foods are often served in larger portions, wrote Tracy Parker, senior nutritionist at British Heart Foundation, in an e-mail. "But the good news is to use healthier cooking methods such as baking, grilling or frying and choosing healthier options – these are simple changes that can greatly affect heart health," said Parker, who was not involved in the research.