Resolved Question: I am not losing weight with a healthy diet and excercise, should i try wu yi tea or acai berry?

I really would like to lose weight and get fit on my own I have about 25 pounds to lose, but I am not seeing any results I am just maintaining my weight. My concern about trying any diet supplements or acai berry or something like that is, can those be used for long term. once you stop taking them will you gain the weight back??