You can find it online, but it is generally difficult to guarantee its authenticity. I suggest you choose a healthy method if you lose weight. Eat less and eat more when you lose weight, which will promote your gastrointestinal peristalsis, fully decompose food and absorb nutrition. Eating less and more meals is healthy and will consume more calories. In addition, it is necessary to exercise more and combine aerobic exercise to lose weight with anaerobic exercise of strength training to achieve the fastest slimming effect. Jogging, swimming and skipping rope every day will have an effect after a long time. Download some videos of yoga and aerobics from the internet, and you can practice more at home at ordinary times, which is very helpful for body shaping.