I have and did some research on them...seems that they are simply "high fiber" tablets with some other ingredients and said to possibly help to reduce hunger but weight loss because of them is "improbable".
It took me a long time and several bottles of different "miracle" pills to realize that there is no improving a healthy diet and exercise plan. I guess there is a few drugs (rda approved and possibly ephedra cousins) that can assist in a mild case of expedited weightloss, but the pills containing stimulents have harmful side effects, e.g. raised blood pressure & heart palpitations (sp?).
Personally, my advice would be to send them back for a refund as soon as they arrive, but if you do decide to try them and they do have some miracle properties....LET ME KNOW CUZ I WANT SOME!!!
Seriously though...do a search on google or yahoo..."Lipozene reviews" and "Lipozene Studies"...then find the sites that are not sponsored by Lipozene. Doing those searches have set me straight on diet pills.
Best of luck