Tim makes some very good points here that I think everyone should try to chime in on. Another thing to always look at is how reliable the source of the study actually is. We see muscle tech articles that say a "study" was done and you can gain something crazy like 10lbs of muscle in a month on creatine. We throw that out because we know they aren't a reliable source. A lot of these studies are done the same way.
In one of my biology classes our professor handed out this big study on all the health benefits of green tea. So you read it and your like ok wow great green tea is good for you. But the professor pointed out that the study was most likely just as tim said only pointing out every benefit it could find because the source of the study was produced by a company that sales green tea like lipton.
I think too many times we read something that says "a study was conducted" and right away we believe it.