The benefit of added chromium for diabetes has been studied and debated for several years. Several studies report that chromium supplements may improve diabetes control. Chromium is needed to make glucose tolerance factor, which helps insulin improve its action. Because of insufficient information on the use of chromium to treat diabetes, no recommendations for supplementation exist.It is also used for depression, polycystic ovary syndrome (PCOS), lowering ?bad?cholesterol, and raising ?good? cholesterol in people taking heart medications called beta blockers.