Like Zoe said, it must be pure if in tab or liquid form.
The tea is the best , don't steep too long, 3-4 minutes
per bag is best ,I have found thanks to experimenting and
to the advise of folks here. Save the bag for one more steeping.
I like Senna tea much more than most because you can get it organic.
It is strong though...
Smoothe Move is good too...sounds like you have to go online to get that.