Dietary patterns linked to cognitive decline and biological aging

New research suggests that dietary patterns significantly influence cognitive health and biological aging in older adults. A study led by Murdoch University and Alzheimer’s Research Australia, involving participants in Western Australia, found that a ‘Western-style’ diet—characterized by processed meats, sweets, refined grains, and beer—may accelerate attention decline in individuals carrying the APOE ε4 gene, the strongest common genetic risk factor for late-onset Alzheimer’s disease.

Complementary research from the University of Sydney indicates that physiological markers of aging can shift rapidly through nutrition. In a study of 104 participants aged 65 to 75, researchers observed reductions in estimated biological age after only four weeks of following specific dietary plans. The study evaluated various omnivorous and semi-vegetarian diets, measuring 20 physiological biomarkers, including blood pressure, cholesterol, and insulin, to determine how dietary adjustments impact the body’s functional age.