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A Study of 678 Nuns in Convent Unlocked New Information About Dementia

For more than three decades, a group of Catholic sisters quietly reshaped what scientists understand about aging, memory loss and Alzheimer’s disease. The Nun Study, a National Institute on Aging project that began in 1990 with 678 School Sisters of Notre Dame, produced findings that continue to guide dementia research today, even though every sister who took part has now died. Their contribution matters now because researchers are still publishing on the data they left behind. In 2025, Alzheimer’s & Dementia, The Journal of the Alzheimer’s Association published a scientific review summari...