As far as the studies I have been able to find, there is no conclusive evidence. There is, however, evidence that when DHT is given to men with BPH, the prostate shrinks.
Abstract OBJECTIVES Benign prostatic hyperplasia (BPH) is a prevalent disease with significant health and economic impacts on individuals and health organizations across the world, whilst the cause/initiation of the disease process has still not been fully determined. METHODS This review...