1. In fact, if you want to set weight-loss special effects in Tik Tok, you should first select the "+"option at the bottom of the page and set special effects after opening the video shooting page.

2. Next, select the "props" function in the lower left corner of the video shooting page to find the "slimming" effect from the list of special effects that appear.

3. In this way, you can find the slimming effect shown below, click finish setting, and then you can automatically lose weight as long as you ensure that you are all in the camera.