This is why we hardly ever publish supplement-backed studies

Company-sponsored studies are significantly more likely to paint a rosy picture of their drug or device than independent trials, according to a new Cochrane review in the December issue. Company-sponsored trials were more likely to report favorable efficacy results, safety profiles, and conclusions compared with non–industry sponsored studies.

Citing a need for improved transparency, the authors emphasize that their findings "resonate" with current calls for better access to raw data and information about how trials are carried out.