This tea speads up your metablolism. and I like it for the taste
There is a tea called HolyTea that helps you lose weight by gently cleaning and removing debris collected in your gut over the years.Italso has a slightly laxative effect to start with but many all over the world recommend it and one of its main constituens, mallow is prescribed by doctors in Germany and Austia. It also uses Milk thistle which is a detoxer. Hope that help.
To lose wieght thogh try My O3 World
http://www.myforevergreen.org/index.cfm
good luck
p