Key Takeaway
Higher lithium levels in drinking water associated with lower dementia incidence in Danish population study of 800,000+ people.
Summary
This large Danish population study examined the association between lithium exposure from drinking water and dementia incidence.
Key findings:
- Included 73,731 dementia patients and 733,653 controls
- Higher lithium levels in drinking water associated with lower dementia rates
- Dose-response relationship observed
- Effect remained after controlling for confounders
Exposure levels:
- Low: 2.0-5.0 µg/L
- Medium: 5.1-10.0 µg/L
- High: >15.0 µg/L
- Higher levels = lower dementia incidence
Clinical significance:
Provides population-level evidence supporting lithium's potential neuroprotective effects, complementing mechanistic research on lithium and brain health.
Figures
Figure 1