Best weight loss supplement or regimen for those last 15 pds on a woman??

Hi. I had a baby a little while ago and I am a performer I need to loose those last 15 pds .. Does anyone no of a dietary supplement that actually works prefeably without caffeine. Or special juice fast? I use to use stacker 3 I think they worked but I was so active at the time I took them that I am not sure if it was just the amount of activity or the pills...