May 11 is World Obesity Day. Obesity can easily cause hypertension, diabetes, cardiovascular and cerebrovascular diseases, menstrual disorders, infertility and even tumors. Xu Lijuan, director of the Health Management Center of Wuhan University People's Hospital (Hubei Provincial People's Hospital), said in an interview with people.com.cn that overweight or obesity greatly affects health, and the concept of maintaining healthy weight should run through the whole life cycle. The following misconceptions may lead to weight loss failure, or may cause adverse effects on the body, and must be avoided.