Researchers surveyed 10,670 women in the Nurses Health Study who were in their late 50s and early 60s. They were asked about their diet and fifteen years later the same women were interviewed about their health.
Mediterranean diets were found to be healthy because they contain chicken, fish, fruits, beans, salads and wine.
"In summary, we found that greater quality of diet at midlife was strongly associated with increased odds of good health and well-being among individuals surviving to older ages. Maintaining physical, cognitive, and mental health with aging may provide a more powerful incentive for dietary change than simply prolonging life or avoiding any single chronic disease," researchers said.
There was more focus on plant foods, whole grains, and fish with reduced intake of red and processed meats.
The study also underlined the benefits of following a healthy diet which can boost the quality of aging.