I do find it funny that people think "natural," and "herbal," equals safe... I could pull something natural and herbal out of my yard that would probably kill you in a tea, were you foolish enough to drink it. But China's food safety laws...and I do suspect they have good laws...like the labor laws they have...they don't get enforced. So...probably a bad idea to buy medicinal herb mixes from China. I actually think it's better to take standardized extracts of single-plant supplements, and if you find one that seems to help whatever it is? keep using the same dose, the same supplier. And for the love of gods, do your homework! herbal medicine isn't as tightly regulated...you have to know the potential dangers of whatever it is you take!