Taking medicine to lose weight, whether it is useful or not, has great side effects. Many of them affect the stomach and make you unable to eat, which is very unhealthy.
Sticking navel to lose weight is unscientific. Obesity is due to too much dark fat. Losing weight is to lose weight by consuming fat and calories. Sticking your navel can make you so thin, so there are so many obese people. Suggest healthy exercise to lose weight. Don't trust any weight loss products.