Dominic,
I searched for a research article that supports the supplement Saw Palmetto and could not find a research article that reported this supplement really made a difference in the outcome of PSA levels. I think it is important to provide information to men about prostate health and the signs and symptoms of BPH.
I do feel supplements can support the body, but there is not a supplement that will keep you from getting BPH. Good health maintenance and regular doctors visits are key.
Jill