Seeing Announcer Bae Seong-jae, is the Wigobi injection ineffective for reducing appetite?

While watching a rerun of *Same Bed, Different Dreams* yesterday, I heard that Announcer Bae Seong-jae has been taking Wigobi weight loss injections for over a year. Watching the broadcast, I was shocked by his insatiable appetite; he ate non-stop. He even woke up in the middle of the night to eat japchae and snacks. Does the effect really vary from person to person?

I've become interested and want to try it, but are there any side effects?