He has an autobiography coming out, in which he talks about his battles with anorexia, and depression to the point of suicidal thoughts.
https://www.dailymail.co.uk/tvshowbiz/article-7464325/Doctor-star-Christopher-Eccleston-reveals-battle-anorexia-drove-suicide.html
https://www.dailymail.co.uk/tvshowbiz/article-7464325/Doctor-star-Christopher-Eccleston-reveals-battle-anorexia-drove-suicide.html