Food has been shown to be an important part of how people age. In one study, scientists investigated how dietary patterns influenced changes in BMI and waist circumference, which are risk factors for many diseases. Scientists grouped participants into clusters based on which foods contributed to the greatest proportion of calories they consumed. Participants who had a "meat and potatoes" eating pattern had a greater annual increase in BMI, and participants in the "white-bread" pattern had a greater increase in waist circumference compared with those in the "healthy" cluster. "Healthy" eaters had the highest intake of foods like high-fiber cereal, low-fat dairy, fruit, nonwhite bread, whole grains, beans and legumes, and vegetables, and low intake of red and processed meat, fast food, and soda. This same group had the smallest gains in BMI and waist circumference.
Scientists think there are likely many factors that contribute to the relationship between diet and changes in BMI and waist circumference. One factor may involve the glycemic index value (sometimes called glycemic load) of food. Foods with a low glycemic index value (such as most vegetables and fruits and high-fiber, grainy breads) decrease hunger but have little effect on blood sugar and therefore are healthier. Foods like white bread have a high glycemic index value and tend to cause the highest rise in blood sugar.
Another focus of research is the relationship between physical problems and micronutrient or vitamin deficiency. Low concentrations of micronutrients or vitamins in the blood are often caused by poor nutrition. Not eating enough fruits and vegetables can lead to a low carotenoid concentration, which is associated with a heightened risk of skeletal muscle decline among older adults. Low concentrations of vitamin E in older adults, especially in older women, is correlated with a decline in physical function. Compared with other older adults, those with low vitamin D levels had poorer results on two physical performance tests. Women with a low vitamin D concentration were more likely to experience back pain. These studies support the takeaway message: the nutrients you get from eating well can help keep muscles, bones, organs, and other parts of the body strong throughout life.
So, eating well is not just about your weight. It can also help protect you from certain health problems that occur more frequently among older adults. And, eating unhealthy foods can increase your risk for some diseases. If you are concerned about what you eat, talk with your doctor about ways you can make better food choices
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