On January 6, 1987, he began a hunger strike over his prison conditions. During a visit with his brother Asher and in a letter to his brother Meir, he complained, among other things, of being held in solitary confinement 23 hours a day. When Judy Zimmet traveled to Israel and asked to visit him in prison, prison authorities said they could only meet in the presence of prison officials and with them separated by a glass barrier. Vanunu rejected these conditions, demanding he is allowed to meet her face to face. He filed three appeals to the Israeli Supreme Court protesting his conditions, which were rejected. After 33 days, Vanunu ended his hunger strike.