Twenty pounds is a big concept. It's really difficult to lose weight just by eating bitter gourd. In fact, parents can eat bitter gourd on the premise of reducing the total daily energy intake. If you add proper exercise, 20 kg should be no problem.
Experts suggest that losing a pound a week is healthy. In fact, if you can lose a few pounds a week, who doesn't want to! Hmm. How interesting
If you control your caloric intake well, you should be able to achieve your goal in two months! Wish you success!