Yes, most desired results are permanent. If you’re fortunate enough to receive a physical change utilizing subliminals such as increasing height, changing your eye color, or bone structure, these physical transformations will be permanent.
However, just like you have the ability to evolve and level up, you also have the choice to degrade as well. Like muscle memory, subliminals always allow access to this “new version” of yourself. If you work out intensely for 3 years and stop for a year, you will lose gains and get in worse shape. However, if you head back to the gym, your muscle memory will return in just a couple of weeks.
Therefore, it’s recommended that you still listen to the audio sometimes, even after you got your results, if you feel you are moving in the wrong direction.