I've used Saw Palmetto, nettle and beta sitosterol.
I used Saw PAlmetto and Zinc for nearly a year and it made my skin a lot less oily and my face was mostly clear. I added nettle, but then I also changed my diet and added more supplements like fish oil. My skin cleared completely, but I can't say for sure what did it. I think diet was the biggest thing. I've since dropped Nettle and saw palmetto and only take the zinc that's in my multi and my skin is still clear.