Can someone who has been overweight since childhood still slim down? How do we know if we've successfully lost weight? CGTN speaks with Chen Junshi, an academician at the Chinese Academy of Engineering, who is also an expert in nutrition and food safety, to discuss the facts about weight loss. Watch the video and find out.

Supervisor: Zhang Jingwen

Producer: Yang Sha

Director: Song Chunni

Video editor: Du Junzhi

Videographer: Wang Hongjie

Copy editors: Xu Wen, Chen Chen, Shanaaz Prince

Cover: Li Yueyun