Just asking... but are you making the tea according to the directions on the box? The first time I made the tea I just dropped the bag in boiling water, dipped it for about a minute and then drank.
You're actually supposed to drop the bag in the boiling water, cover the cup for 15-20 minutes, squeeze out the bag, and then drink the tea. The 15-20 minutes is required for the active ingredients to leach out of the teabag and into the water.
I'm not accusing you of doing it wrong... just suggesting a possible reason why the tea does work. It works pretty well for me.