Used Saw Palmetto 10 years ago but switched to Beta- Sitosterol. I also use Stinging Nettle and lots of Vitamin D3, Selenium, Milk Thistle and Green Tea Extract. My results are good enough, predictable enough, that despite decades of a PSA (that useless test data) that stays between 6 and 10, my VA Docs and Uro are very happy with me on the Test Cyp they send me every month.
Here is a good, concise comparison of Beta-Sitosterol and Saw Palmetto. I have to say the Europeans, (I lived in Germany and Holland at that time) were already miles ahead of us 10 years ago.
Beta-Sitosterol versus Saw Palmetto for Prostate Health
Beta Sitosterol vs. Saw Palmetto for Prostate Health