Do diet supplements really work?

Now that it's the season when clothes get thinner, I'm getting impatientㅠㅠ I'm trying to exercise and control my diet, but I'm not losing weight as much as I thought, so I'm looking into diet supplementsㅋㅋㅋ But honestly, I'm still worried because I wonder if I'll lose weight dramatically if I eat these things.

I see people on Instagram and online communities saying they lost a few pounds by taking diet supplements, but I can't tell if it's actually thanks to the products or if they're just eating less. I feel like I'm just wasting money, so I keep opening and closing the payment page over and over again. LOL

Some people around me have reported seeing the benefits of diet supplements, while others have also suffered from side effects, so I'm especially cautious. Has anyone tried them themselves and found they actually helped reduce body fat? Or are supplements just a psychological comfort? Please share your honest thoughts!