The article discusses the global problem of obesity as a socio-ethical phenomenon in the context of UNESCO’s program on bioethics, the ethics of science and artificial intelligence. The article also explains the stigma of obesity, or, in other words, the discrediting social identity assigned to an overweight person, and describes the consequences of such stigmatization. The author explores the socio-ethical causes of obesity and points out the link between obesity and some of the challenges addressed by the Sustainable Development goals, including hunger and social inequality.