# Metformin May Cut Dementia Risk by Half, Study Suggests

A new analysis suggests that the common diabetes drug metformin may reduce the risk of developing dementia by up to 50%. Researchers reviewed health data from thousands of patients, finding a strong protective association even after accounting for other factors. The finding is significant because metformin is affordable and widely used, offering a potential new avenue for dementia prevention.

**Importance:** 4/5

## Sources

### Science
- [New Scientist](https://www.newscientist.com/article/2586113-diabetes-drug-metformin-may-halve-the-risk-of-dementia/?utm_campaign=RSS|NSNS&utm_content=home&utm_medium=RSS&utm_source=NSNS) — Mon, 24 Aug 2026 13:25:10 +0000

### World
- [The Guardian World](https://www.theguardian.com/society/2026/aug/26/women-hrt-lower-risk-dementia-study) — Wed, 26 Aug 2026 12:51:42 GMT