Once the fat cells have been frozen, it will take some time for them to be flushed out of your body. You’ll start to see improvements within about 3 weeks, and you might continue to see improvements for up to 6 months. Once these cells are destroyed and eliminated by the body, they are gone for good! However, it is always possible to regain weight and fat. The best thing you can do to maintain your CoolSculpting results is to live a healthy lifestyle: eat a healthy diet and get regular exercise.