By Lisa Rapaport (Reuters Health) – – One in five cases of chemical-induced liver damage come from herbal and dietary supplements, a research review concludes. A decade ago, less than one in 10 cases could be linked to supplements, researchers report in the journal Hepatology. Up to half of U.S. adults consume supplements that contain ingredients such as vitamins, minerals, teas and proteins to improve diet, as well as illegal anabolic steroids, which are synthetic versions of testosterone used to boost athletic performance, the study found.