Study Finds Brewing Tea Can Remove Heavy Metals from Water

Research reveals that tea leaves naturally absorb contaminants like lead, but experts caution it is not a substitute for proper water filtration.

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.