I've read it multiple places. Supposedly with long term use for 6+ months it MAY help. Also read that studies are using CLA from animal sources whereas the supplements sold are derived from safflower. There are studies on NIH which support its effectiveness, but every study I read was done using overweight subjects. I'm just your average joe passing along the info I've read though. Do some reading and make that call for yourself.
Here's one on Marks daily apple, there's a men's health article if you even give that any credit
, and a bunch on NIH. Take it fwiw.
http://www.marksdailyapple.com/cla-supplements/#axzz4EK1xApnc