Since leaving One Direction, Zayn Malik has not shied away from speaking honestly about his experiences with anxiety and depression.
Now, in his new book, titled "ZAYN," he is also opening up about his experience with an eating disorder for the first time.
In an excerpt of the book obtained by The Sun, the 23-year-old singer wrote about how he would go days without eating back in 2014, a few months before he left One Direction.
While one common catalyst for an eating disorder such as anorexia is the desire to lose weight to be thin, Zayn explains it wasn't like that for him.
However, this didn't make Zayn's eating disorder any less severe. He said as a result of not eating, he lost an unhealthy amount of weight, writing,
The book, "ZAYN," was released today, and is described on the website as a "photographic journey" of Zayn's life, along with personal essays from Zayn.
Zayn himself described the book on his Instagram page as his "diary" and a way to "contextualize some of the moments and memories" fans have shared with him.
While Zayn describes himself in that Instagram post as "healthy" today, he has dealt with bouts of anxiety in the last year.
In September, the singer canceled his October 7 performance at the Autism Rocks Arena in Dubai due to "extreme anxiety," which he explained in a statement apologizing to fans.
Earlier in the summer, he pulled out of a performance in Wembley Stadium in London only hours before he was supposed to take the stage.
Perhaps this photographic journey will give fans insight into those cancelations, as well.
Citations: 'I'D GO DAYS WITHOUT EATING' Zayn Malik reveals that he suffered from a crippling eating disorder while in One Direction (The Sun)