Yes, dehydration is something everyone taking laxatives or detox teas should watch out for. In the process of trying to lose weight, you expend a huge amount of electrolytes. Having a jug or bottle of mineral water on hand always helps. Again, there's nothing wrong in working hard to lose weight. What's not right is when you deliberately sacrifice your health just so you can see immediate results.
Yes, I completely agree that to lose weight you need to do exercise and yoga and got to gym. There are many ideas that you can lose your weight but to be dependent on laxatives is just a fake and bad idea. Just do it yourself and then seeing the results of doing it yourself will make you feel awesome. Good luck.