I have eaten bitter gourd capsules, which can detoxify and lose weight. I lost five pounds after eating them for ten days, then slowed down and lost 10 kg in a month. I haven't eaten since, and my mother said it wouldn't look good if I was thinner. It's been 50 days now, and it hasn't rebounded.
It should be noted that people with cold constitution had better not eat it, and don't eat it before and during menstruation, otherwise they will have dysmenorrhea!