Ultra-Processed Foods Might Hurt Attention and Raise Dementia Risk, Study Shows

A study of more than 2,100 middle‑aged and older Australians found that higher intake of ultra‑processed foods—about 41% of daily calories—was linked to declines in attention and processing speed, with each 10% rise in ultra‑processed consumption associated with worse cognitive function and more dementia risk factors, even among those following generally healthy diets. While the study suggests processing itself may impact brain health, it is observational and does not prove causation. Experts advise limiting ultra‑processed foods and leaning on whole foods and brain‑friendly diets like the Mediterranean or MIND approach to support cognitive health.