Health scientists, and health science reporters, know there’s a bias that leads to more published studies showing positive results for treatments. Many of the studies that show negative results are never published, but there are some out there, if you know where to look. If you want to know what treatments don’t work Ivan Oransky has three recommendations: Compare registration lists of medical trials to published results; step away from the big name books and read through some lower-ranked peer-reviewed journals; and peruse the delightfully named Journal of Negative Results in Biomedicine.