It is possible, but I think it is better to be healthy. I have a friend who often doesn't want to eat when he has a bad stomach. After a few days, even if she didn't use it for seven days, she could see that she was obviously thin and haggard. Health is the most important thing. If obesity does not affect more important aspects than health, then don't try that unnecessary weight loss method. If you want to lose weight, you should have a reasonable diet and exercise. Everything is important.