Comparing the caffeine content of black tea and coffee isn't as simple as you might expect. Here's what you should know in ...

Tea bags found on grocery store shelves are made from a variety of materials, including plant fibers like ... But finely ground tea leaves, particularly black tea leaves, adsorbed slightly more ...

With their wrinkled surfaces, black tea leaves, shown above at 300 times magnification, provide ample space for the adsorption of lead. (Credit: Vinayak P. David Group/Northwestern University) Want a ...

Finely ground tea leaves, particularly black tea leaves, adsorbed slightly more metal ions than whole leaves. Again, the researchers attributed this to surface area. "When tea leaves are processed ...