Older adults who cut back on dietary fat or reduced the amount of animal-based protein they consumed showed signs of becoming biologically younger, according to new research from the University of Sydney. The study, published in Aging Cell , found that adults between the ages of 65 and 75 experienced reductions in their estimated 'biological age' after following specific diets for just four weeks. Researchers say the findings suggest dietary changes later in life may quickly improve markers linked to aging and overall health. The research was led by Dr. Caitlin Andrews from the University of Sydney's School of Life and Environmental Sciences. While the results are promising, the scientists emphasized that the study provides only an early indication rather than definitive proof that diet can reverse aging. They say larger and longer studies are needed to determine whether these biological changes lower disease risk over time and whether the same effects occur in other age groups. What Is Biological Age?…