Great suggestion! The tannins in the tea (black teas) dry out the sweat glands in the feet and is used for treatments in hyperhydrosis/bromo cases. Check out discovery health or Dr oz I am sure they have it on there as well.
I noticed the black tea helps my oral odors when one of my teeth act up. Instead of blowing awful bad breath around the room, the whole room smells like black tea instead. Good trade off.