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Abstract
The prevalence of adult obesity has dramatically increased in recent decades. In 2015, more than 107 million children and 603 million adults were obese in the world. Since 1980, the obesity prevalence has doubled in more than 70 countries and the trend is seen in most other countries. Obesity has become a global epidemic. Many non-communicable diseases are correlated with obesity, including type 2 diabetes, certain kinds of cancer, heart diseases and musculoskeletal disorders. Significant effort has been made in the past few decades to devlop strategies and various methods in dealing with obesity epidemics. This thesis aims to provide summary on methods and strategies that have been developed or those remain at development stage. The focus was centered around description about pathology of obesity, principles and procedure of bariatric surgeries. Chemical approaches employing drugs are also descibed. Future perspectives is provided to present the pros and cons of the currently available methods and future direction in development.