Across all mental illnesses, anorexia nervosa has the highest rate of mortality.

But pro-eating disorder websites on social media platforms like Instagram and Tumblr host communities of individuals who promote disordered eating as a choice, not as an illness, and use the internet to share tips and discuss their food restrictions.

We spoke with author Dr June Alexander, Dr Ysabel Gerrard, Lecturer in Digital Media and Society at The University of Sheffield, and Rachel Cohen, psychologist at the Black Dog Institute and PHD candidate at the University of Technology Sydney.