A recent study highlighted why some research is viewed critically. The study found that two dozen Japanese medical student who drank pro- milk theirbodies duced fewer stress hormones than other students who did not. But 14 of the 17 scientists who wrote the paper work for Yakult, the company that makes the drink. Linda Thomas, science director at Yakult's London office, said that Pedersen's review of studies didn't look at other ways that probiotics affect health. A2001 Finnish study, for example, found that a pro- biotic milk drink had a small b