Table 1.

Inhibitory effects of PFE, Rib and Fin on 5α-reductase activity in rat prostate

Group	5α-reductase inhibition (%)
PFE	31.8 ± 15.0
Rib	89.1 ± 18.1
Fin	94.3 ± 46.1

The effect of PFE (PFE-treated group) on rat prostatic 5α-reductase was tested at a concentration of 0.25 mg/mL. A nonsteroidal-positive control with Rib (riboflavin-treated group) of 1000 μM and a steroidal-positive control with Fin (finasteride-treated group) of 100 nM. Values are means of results from two different experiments