One More Year of School, Less Dementia Decades Later? What a New Study Found
Saturday, October 24, 2026
Scientists have long noticed that people with more years of education tend to develop dementia less often. The hard part has been proving that schooling itself helps, rather than the things that often travel with it, like family income or better health care. A study announced by the National Institutes of Health on October 23 offers some of the strongest evidence yet.
What happened. In the 1970s, the United Kingdom raised the age at which students could leave school from 15 to 16, for children born after September 1, 1957. Because the change depended only on birth date, researchers from the University of Wisconsin–Madison and the University of Southern California could compare people born just before and just after the cutoff, a kind of natural experiment. Using health records from more than 100,000 people in the UK Biobank, they found that the extra year of school lowered dementia diagnoses by about 0.88% over up to 50 years. That sounds small, but dementia before age 65 is uncommon, so the researchers describe it as a large effect. People with genes that raise Alzheimer's risk appeared to benefit the most. (Source: National Institutes of Health, October 23, 2026.)
Why it matters. This supports the idea of cognitive reserve: a brain that has been challenged and trained may cope better with damage later on. The researchers also linked the reform to better jobs, income and health, which may be part of how education protects the brain. Low education in early life is one of the risk factors in the major Lancet Commission list we cover in reducing dementia risk.
What it does not mean. The oldest people in the study were only 65 when diagnoses were counted, and most dementia is diagnosed later in life, so the full picture isn't in yet. The authors say the difference could grow or shrink as the group ages. And it's about school in childhood; it doesn't tell us how much learning later in life lowers risk. Someone who left school early is not destined to get dementia, and plenty of highly educated people still do.
Try this today: start learning one new thing
You can't go back to high school, but you can keep giving your brain new challenges. Pick something that's genuinely new and a little hard for you, such as a language app, a musical instrument, a class at the library or community college (many offer free or low-cost courses for older adults), or a craft that uses your hands and your head. Aim for a few short sessions a week rather than one marathon. Doing it with someone else adds the brain benefits of social connection too. Our guide to learning new skills at any age has more ideas.
Thanks for reading, and enjoy your weekend. We'll see you tomorrow.
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