The foods that delay dementia and heart disease. Backed by a 15-year study

What we eat as we age may determine how many chronic illnesses we face later in life. A 15-year study of more than 2,400 older adults reveals that diets rich in vegetables, whole grains, nuts, and healthy fats slow the accumulation of diseases like cardiovascular problems and dementia-while inflammatory diets heavy in red meat and sugary drinks speed it up. Researchers now aim to pinpoint the most effective dietary recommendations to promote longer, healthier lives.