The olfactory system connects directly to memory and emotion centers in the brain, making it a potential early indicator of Alzheimer’s disease. A new Nature Communications study found that cells in the nose show early signs of Alzheimer’s, even in people without symptoms. Researchers observed inflammation and immune activity, suggesting changes begin long before memory loss appears. This means the sense of smell may offer a simple way to study early brain changes. Why this matters to me This connects to my research presented at the Regeneron International Science and Engineering Fair, where my project received a 3rd Place Grand Award. In my study, I found that smell based sensory stimulation improved emotional engagement in Alzheimer’s patients. This research helps explain why. Final thought If Alzheimer’s begins in ways we cannot see, but might be able to smell, it changes how we think about detection and care. Sometimes the most overlooked senses hold the most important answers. Source D’Anniballe VM, Kim S, Finlay JB, Wang M, Ko T, Luo S, Whitson HE, Johnson KG, Goldstein BJ (2026). Olfactory cleft biopsy analysis of Alzheimer’s disease pathobiology across disease stages. Nature Communications, 17:2245.
