PT Journal AU Diana Ramirez Cifuentes Ana Freire Ricardo Baeza Yates Nadia Sanz Lamora Aida Alvarez Alexandre Gonzalez Meritxell Lozano Roger Llobet Diego Velazquez Josep M. Gonfaus Jordi Gonzalez TI Characterization of Anorexia Nervosa on Social Media: Textual, Visual, Relational, Behavioral, and Demographical Analysis SO Journal of Medical Internet Research JI JMIR PY 2021 BP e25925 VL 23 IS 7 DI 10.2196/25925 AB Background: Eating disorders are psychological conditions characterized by unhealthy eating habits. Anorexia nervosa (AN) is defined as the belief of being overweight despite being dangerously underweight. The psychological signs involve emotional and behavioral issues. There is evidence that signs and symptoms can manifest on social media, wherein both harmful and beneficial content is shared daily. ER