Anthelmintic inhibitor 5?-reductase (which converts testosterone to dihydrotestosterone. The latter is involved in the proliferation of prostate cells) and anti-inflammatory.
One study found that pumpkin seed oil inhibits prostate hyperplasia induced by testosterone. Furthermore, this oil also lowers the pressure of the bladder and urethra.
The European Medicine Agency (EMA) approved the traditional use of pumpkin seeds to treat urinary discomfort associated with benign prostatic hyperplasia and unstable bladder.