A new study found that higher lithium levels in drinking water are associated with significantly greater odds of Wolff-Parkinson-White (WPW) syndrome in children. Researchers analyzed over 4 million children across California and New York, finding that kids in high-lithium areas had up to 71% greater odds of WPW. Experts caution the findings are correlational and not yet grounds for clinical practice changes.
A study published in the Journal of Clinical Investigation found that children living in areas with higher lithium concentrations in drinking water had significantly greater odds of being diagnosed with Wolff-Parkinson-White (WPW) syndrome — a rare cardiac condition caused by abnormal electrical pathways in the heart that can trigger arrhythmias and, in some cases, sudden death. The research spanned over 4 million children across California and New York cohorts.
Researchers believe the exposure may be prenatal, with lithium in drinking water potentially affecting the development of atrioventricular accessory pathways in utero. Lithium enters water supplies both naturally and through human activities like battery disposal and industrial discharge.
By the Numbers:
Why it matters: While the findings are observational and don't establish causation, they open the door to a potentially modifiable environmental risk factor for a condition whose origins have long been a mystery. Experts say the priority now is follow-up research — not changes to clinical practice or water-avoidance recommendations.
