http://www.bodybuilding.com/fun/mike8.htm
If you go to the Research section in the middle of that article, he cites a bunch of different studies that have pretty convincing results. I'm having a hard time finding the study that originally convinced me about CLA, but these are pretty good/concise excerpts.
EDIT: Thought I'd post this...it's taken from the above link:
Quote:
Even though there has been a number of positive research finding regarding CLA, there are also a large number of more recent studies that have failed to demonstrate any real significant benefits of supplementation with CLA, as mentioned before.
For example, a study of experienced resistance trainers taking 6g per day of supplemental CLA carried out last year failed to find any significant beneficial changes in total body mass, fat-free mass, fat mass, % body fat, bone mass, strength, serum substrates or general markers of catabolism and immunity during training [14]. Meanwhile, earlier this year, a three-month double-blind placebo-controlled study failed to find any improvement in body weight maintenance after a period of weight loss [16]. Interestingly, however, conjugated linoleic acid (CLA) seemed to aid the preferential regain of fat-free mass at both experimental doses of 1.8 and 3.6g per day [16].
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