I agree with gymdandee. Don't waste your hard earned money. There really haven't been enough studies to prove that it actually works or to determine what side effects there might be. Dr. Oz endorses it but isn't his show a bit sensationilistic?
Health professionals with the University of Michigan Health System report that treatment with CLA supplements may negatively affect the function of your blood vessels, which may elevate your risk of developing heart disease. Additionally, CLA supplements may also increase your blood sugar levels and may exacerbate diabetes symptoms in affected people.
Don't waste your $$