I've never used herbal slimmer's teas myself, but I have read the labels of different products out of curiosity ... they're basically laxative and may also stimulate increased urination, so any weight lost is water and intestinal. Daily use can lead to dehydration, and can be very irritating to the bowels.

Doreen

p.s. - I moved your post to the Products forum, where it might receive more appropriate attention.