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This study was undertaken to evaluate a possible effect of the extracts PY102 of Pygeum africanum (Hook), and UR 102 of Urtica dioica L. as well as their combination PHL-00801 (Prostatonin®) on the enzymes 5 α-reductase (5 α-RE) and aromatase (AR):Inhibition of 5 α-RE: Pygeum africanum extract PY 102, and Urtica dioica extract UR 102, inhibited the 5 α-RE activity in a concentration dependent manner...