No, the FODMAP elimination diet is not meant for weight loss.
Research studies have shown that limiting foods that are high in FODMAP's will improve the symptoms of Irritable Bowel Syndrome. In addition, there is some research to suggest that people with Crohn's disease or Ulcerative colitis may also benefit from the low FODMAP approach.
If you have IBS and are interested in losing weight, I would recommend consulting with a dietician who is also familiar with the low FODMAP approach.
W. Travis Dierenfeldt, MD