Overview
- Scientists at Northwestern University found that brewing tea can reduce lead levels in water by about 15% when steeped for three to five minutes.
- Longer brewing times, such as overnight steeping, can significantly increase the removal of heavy metals like lead and cadmium.
- Different types of tea, including black, green, and chamomile, as well as cellulose tea bags, were found to be most effective due to their high surface area for adsorption.
- The study highlights that while tea can passively reduce metal exposure, it should not replace certified water filters for removing contaminants.
- Experts note the findings could help explain potential health benefits in populations with higher tea consumption, such as lower risks of heart disease and stroke.