[Concern] Are diet herbal medicines okay?^^

These days, I suddenly gained a lot of weight...

I'm determined to lose weight again.

I'm thinking of trying herbal medicine for weight loss. Has anyone tried it and found it okay? ^^ I've heard from people around me that some experienced yo-yo effects after taking herbal medicine, and there are also reports of side effects. I'm curious and would appreciate any information. 📝😊