CLA has been an interesting supplement to study. Various published studies have shown that it's useful for helping keep weight off once you've lost it, but that it does nothing to help you lose the weight. It has something to do with the fat cells filling back up again after you've lost weight.
Berkeley Wellness, University of California, has this to say:
Quote:
CLA
Claims: Causes weight loss, makes dieting easier, and helps keep fat off.
If CLA produces any benefits, they would come only from large amounts—more than you can get from food. Nobody knows whether such high levels are safe. And no one understands the long-term benefits and risks.
Bottom Line: Studies have been intriguing, but have had inconsistent results. The long-term risks are completely unknown.
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