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By Jen Christensen, CNN

Updated 1924 GMT (0324 HKT) February 28, 2018

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Not eating enough fruit led to to an estimated 7.5% diet-related "cardiometabolic deaths" in 2012, the researchers said in <a href="http://jamanetwork.com/journals/jama/fullarticle/2608221" target="_blank">a recent study in JAMA</a>. Two servings of fruit are recommended each day. A serving would equal one whole fruit, such as an entire banana, or one cup equivalent.
Photos: Which of your food habits is most dangerous?
Not eating enough fruit led to to an estimated 7.5% diet-related "cardiometabolic deaths" in 2012, the researchers said in a recent study in JAMA. Two servings of fruit are recommended each day. A serving would equal one whole fruit, such as an entire banana, or one cup equivalent.
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Vegetables are another necessary part of a healthy diet, with a recommendation of 2½ cups each day. Not eating enough vegetables led to to an estimated 7.6% of diet-related deaths, such as heart disease, stroke and type 2 diabetes, in 2012. Overall, a larger proportion of men than women died early due to diet-related causes, which researchers say is consistent with generally unhealthier eating habits of men.
Photos: Which of your food habits is most dangerous?
Vegetables are another necessary part of a healthy diet, with a recommendation of 2½ cups each day. Not eating enough vegetables led to to an estimated 7.6% of diet-related deaths, such as heart disease, stroke and type 2 diabetes, in 2012. Overall, a larger proportion of men than women died early due to diet-related causes, which researchers say is consistent with generally unhealthier eating habits of men.
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Nuts and seeds are high-protein foods that naturally come in nutrient-dense forms. The recommendation for healthy eating includes 5.5 ounces of protein-rich foods, such as walnuts, each day. Not eating enough nuts and seeds led to an estimated 8.5% of diet-related cardiometabolic deaths in 2012.
Photos: Which of your food habits is most dangerous?
Nuts and seeds are high-protein foods that naturally come in nutrient-dense forms. The recommendation for healthy eating includes 5.5 ounces of protein-rich foods, such as walnuts, each day. Not eating enough nuts and seeds led to an estimated 8.5% of diet-related cardiometabolic deaths in 2012.
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A healthy diet includes eating whole grains (such as brown rice, quinoa, buckwheat and oats) while limiting your intake of refined grains (white rice and white flour) and products made with refined grains, such as bread and pasta. Too few whole grains (and too many refined grains) led to to an estimated 5.9% of all diet-related deaths due to heart problems, stroke and diabetes during 2012.
Photos: Which of your food habits is most dangerous?
A healthy diet includes eating whole grains (such as brown rice, quinoa, buckwheat and oats) while limiting your intake of refined grains (white rice and white flour) and products made with refined grains, such as bread and pasta. Too few whole grains (and too many refined grains) led to to an estimated 5.9% of all diet-related deaths due to heart problems, stroke and diabetes during 2012.
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Oils provide essential fatty acids and vitamin E. Oils, which are liquid at room temperature, should replace solid fats, such as butter, rather than being added to the diet. Not replacing solid fats with oils led to to an estimated 2.3% of all diet-related deaths caused by heart disease, stroke and type 2 diabetes during 2012.
Photos: Which of your food habits is most dangerous?
Oils provide essential fatty acids and vitamin E. Oils, which are liquid at room temperature, should replace solid fats, such as butter, rather than being added to the diet. Not replacing solid fats with oils led to to an estimated 2.3% of all diet-related deaths caused by heart disease, stroke and type 2 diabetes during 2012.
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Seafood is rich in omega-3 fats, which are good for your heart and brain. Not eating enough seafood led to to an estimated 7.8% of diet-related deaths due to cardiometabolic factors during 2012. For the general population, dietary guidelines recommend 8 ounces a week of a variety of seafood.
Photos: Which of your food habits is most dangerous?
Seafood is rich in omega-3 fats, which are good for your heart and brain. Not eating enough seafood led to to an estimated 7.8% of diet-related deaths due to cardiometabolic factors during 2012. For the general population, dietary guidelines recommend 8 ounces a week of a variety of seafood.
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