The number of fat cells that cannot be reduced is fixed, and then it is fixed after puberty. Obesity means that fat cells get bigger, so they don't lose fat. The most effective way to lose weight is to rest regularly, eat less and eat more meals, drink more water and accelerate metabolism. Walk slowly for half an hour after meals, eat more fruits and vegetables for half an hour, and live a healthy life. Don't believe that diet pills and food are the best way.