A device for controlling the weight of a body comprises a hollow member having an expandable and a non-expandable portion to its exterior surface. The hollow member is selectively expanded and/or contracted following implantation in the abdominal cavity to direct pressure to the abdominal cavity, thereby restricting food intake without physically invading the abdominal cavity. The hollow 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.