Here are the reasons for its R rating:
* Strong violence: The film depicts graphic scenes of violence, including the hunger strike itself and its devastating effects.
* Disturbing content: The film's subject matter is inherently disturbing, exploring themes of political activism, hunger strikes, and the physical and mental deterioration of the body.
* Nudity: There are some scenes of nudity, particularly in the context of the hunger strike.
* Language: While not excessive, some strong language is used throughout the film.
Overall, "Hunger" is a very intense and challenging film that explores difficult themes. Its R rating reflects the graphic and disturbing nature of its content.