"Complex relationship between sex hormones, insulin resistance and leptin in men with and without prostatic disease", by Halina Grosman et al., Journal The Aging Male, Volume 19, 2016 - Issue 1
Quote:
Results: Prostate cancer and BPH patients presented higher total, fT and bT levels than CG. IGF-1, insulin and HOMA index were higher in BPH than in the other two groups.
See also the following case report: