A device for controlling the weight of a body comprises a passive or expandable member. The expandable version of the member includes an expandable and a non-expandable portion to its exterior surface. The member is selectively expanded and/or contracted following implanted within the abdominal cavity to provide pressure to the abdominal cavity, thereby restricting food intake without physically invading the abdominal cavity. The expandable version of the member is expanded and/or contracted following implantation to vary the amount of pressure provided to the abdominal cavity. The member is preferably positioned superficial to the fascia, muscle, peritoneum and abdominal cavity of the abdominal region according to the method of the present invention to minimize the risks associated with traditional food intake restriction surgeries.