A recent study conducted by researchers from the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts University and Harvard T.H. Chan School of Public Health has found that intakes of dietary fiber, high-quality carbohydrates, and total carbohydrates in midlife are linked to healthy aging and other positive health outcomes in older women.
The study, published in the journal JAMA Network Open, aimed to understand the long-term effects of different macronutrients on health. Lead author Andres Ardisson Korat explained, “Our findings suggest that carbohydrate quality may be an important factor in healthy aging.”
The researchers analyzed data from the Nurses’ Health Study, focusing on the diets and health outcomes of over 47,000 women aged between 70 and 93 in 2016. They found that intakes of total carbohydrates, high-quality carbohydrates from whole grains, fruits, vegetables, and legumes, as well as total dietary fiber, were associated with a 6 to 37% greater likelihood of healthy aging and positive mental and physical health outcomes.
On the other hand, intakes of refined carbohydrates and starchy vegetables were linked to lower odds of healthy aging. Senior author Qi Sun highlighted the importance of consuming fruits, vegetables, whole grains, and legumes for overall health and well-being.
While the study focused mainly on white health professionals, the authors acknowledged the need for more diverse cohorts in future research. They also emphasized the importance of understanding the mechanisms behind the link between dietary fiber, high-quality carbohydrates, and healthy aging.
As more studies uncover the connection between midlife dietary choices and quality of life in later years, the researchers hope that science can continue to help people live healthier and longer lives. The study provides valuable insights into the role of carbohydrates and dietary fiber in promoting healthy aging and overall well-being.
For more information, the study can be found in JAMA Network Open under DOI: 10.1001/jamanetworkopen.2025.11056. This research was conducted by Tufts University and highlights the importance of diet in maintaining good health as we age.
