Saw palmetto seems to prevent androgens like testosterone from aromatizing into body hormones like DHT. Also it tends to lower overall hormone levels which in excess leads to acne. :-0 hope that helped.
I was using Saw Palmetto, and it did seem to work at first, until I used Sea Breeze sensitive skin astringent. The sea breeze really broke me out bad, so I decided to stop using the Saw Palmetto, because I was not sure if it was breaking me out. I doubt it was breaking me out so I will probably start using it again soon with out changing my regimen.