When it comes to cancer, many people may think that it is an old age disease and only when you reach a certain age, you may get cancer; young people, especially teenagers, who are young and have good health, will not get cancer. In fact, cancer is not an “exclusive” disease for the elderly, but a trend of youthfulness has emerged. It is estimated that in 2018, about 1.2 million cancer cases and 400,000 cancer-related deaths occurred among people aged 15-39. Increasing cancer rates among adolescents and young adults A study involving researchers from the International Agency for Research on Cancer (IARC) found that cancer rates were on the rise in 23 of 41 countries among people aged 15-39 years, including China. In China, cancer incidence rates increased by about 0.75% per year in young men and 1.82% per year in women, with the exception of melanoma. Cancer incidence rates remained stable in 16 countries; only 2 countries showed a decreasing trend. Among the younger population, thyroid cancer, testicular cancer and three obesity-related cancers, including colorectal cancer, breast cancer and kidney cancer had the highest annual increase in incidence. Data from an earlier study in The Lancet showed that obesity may increase the risk of uterine cancer by 62 percent, as well as the risk of gallbladder cancer by 31 percent and kidney cancer by 25 percent. Obesity and cancer are inextricably linked A recent paper published in the Journal of Clinical Oncology, “Global Trends in Overweight and Cancer Burden,” provides a comprehensive summary of the occurrence of tumors due to overweight and obesity and the resulting disease burden. The study even points out that in 2012 there were more than 540,000 cases of cancer that could be attributed to being overweight or obese, accounting for 3.9% of all cancers, which is not the most frightening, while the data also shows that behind this 540,000 figure, there is a “reserve army” of hundreds of millions of overweight cancers. The problem of obesity is more terrible than people think, and now obesity has been called the second preventable cause of death after smoking, and now the direct and indirect deaths caused by obesity are up to 3.4 million per year worldwide! Obesity is a potential cause of many cancers, such as post-menopausal breast cancer, colorectal cancer, uterine cancer, esophageal cancer, gallbladder cancer, kidney cancer, liver cancer, ovarian cancer, pancreatic cancer, stomach cancer, thyroid cancer, meningioma and multiple myeloma, etc. are all related to obesity. Obese women are more likely to develop ovarian cancer, endometrial cancer, bladder cancer and postmenopausal breast cancer. Men who are obese are more likely to develop prostate cancer. The more severe the obesity, the higher the chance of developing the above cancers. People do not need to despair, because obesity can be reversed Weight loss has a great impact on health. Weight loss can substantially improve the phenomenon of sleep apnea syndrome, as well as fatty liver, and the reduction of pressure on bone and joint, and other benefits, weight loss is very necessary for obese people. But some obese or overweight people, due to excessive weight, many daily weight loss methods including brisk walking, running, cycling and so on these exercises are not suitable, not only to the body joints cause too much damage, at the same time, these traditional weight loss methods have slow results, easy to regain some disadvantages. For some patients with morbidly severe obesity and some obesity with complications, Dai Xiaojiang, a bariatric and diabetic surgeon, suggests using bariatric and metabolic surgery to lose weight, which is recognized by the World Health Organization as an effective long-term treatment for obesity. The surgery can achieve the ultimate goal of weight loss by rebuilding the patient’s gastrointestinal and digestive system. The surgery is effective and can reduce 60% to 80% of the body’s excess weight in about one year, and can also alleviate and treat the complications of obesity and effectively reduce the incidence of cancer, which is a multi-benefit weight loss program.