Some, like Lipoderm, seem to have documented effects attributed to them but you need to be on a calorie deficit diet in order for them to do their 'magic'. I have never tried them myself though so I'm merely relating opinions really. My guess is that you can spend that money on some ECA and a good guggul supplement and get much better results from that.
well actually cutting gel worked better than anything i ever tried before.i never seen anything to work as well as it did even the world famous hydroxycut couldnt top it cause i tried it too