Lower in caffeine than coffee yet rich in antioxidants, black tea is more than just a comforting morning ritual. With ...

To start things off, the scientists added specific quantities of lead, chromium, copper, zinc and cadmium to samples of clean water, then heated that water to just below the boiling point.

Finely ground black tea leaves performed best at removing toxic ... zinc and cadmium), and then heated the solutions to just below boiling temperature. Next, they added the tea leaves, which ...

The type and grind of tea also mattered to a minor degree. Finely ground leaves, especially those of black tea, adsorbed more contaminants than whole leaves. “When tea leaves are processed into ...