So here's what looks like a one of kind study on SAW PALMETTO, you'll notice some gaping differences which is alarming, they compared about 20 differ at brands of SP.

Fatty Acid and Phytosterol Content of Commercial Saw Palmetto Supplements

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3798925/pdf/nutrients-05-03617.pdf