Losing weight quickly does not work. The only thing that results in lasting weight loss is changing your lifestyle. It takes time to develop new habits. Other wise you become a YO-YO dieter.
Ask people you know who have been thin forever what they do. You will find they have healthy habits that keep them thin.

no i wasx on a quick diet
i lost it but then i regain it andf more

No, it actually takes an entire lifestyle change to keep it off.

No, if you lose weight quickly it will be hard to keep it off. After you go back to a normal routine, you will gain the weight back. Also, if you lose weight too quickly you will lose more muscle than fat.

a quick weight loss program sounds like a rip off. Losing weight takes time and its not the same for everyone. How much weight are you planning on losing. A low carb high protein diet is a good one for you to do. But dieting alone is not enough , you need to maintain your exercise habits and intake lots of water.

no, not healthy and usually a scam
if it were to work you'd just end up gaining all the wieght back in like a week