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Tonalin is the brand for the CLA that they have done the most research on. It is derived from Safflower oil. I buy the GNC "total lean" brand. It's made from the same thing. Other ingredients are Gelatin and Glycerin (for the capsule). And... that's it! Getting them during the first week of the month, usually buy one/get one half off. They are the same ingredients, so I would just get whichever one is cheaper.
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