Flat belly tea?

Does anyone use or have used detox teas? I'm dieting and excersizing but want something to maybe help make it alittle faster. I have lost 7 lbs in a month which is ok I guess bit my body loses weight very slowly... and ibhave like 31 more pounds to go... what about green tea? Does green tea help. I have heard it can. Did anyone try that and it help?