I've been taking Adv Prostate Formula for a little over two weeks, and so far have experienced no particular problems, but also no particular improvement. I have taken/used various prostate friendly herbs and items for decades, singly and in various amounts and combinations, and a number of specific prostate formulates. I have experienced problems from all but one of the single and formula beta-sitosterols (and that particular one is no longer available, of course, since all good things do come to an end), and not liked effects of most formulas over the past decade and more. A former test engineer, I started somewhat skeptical but with positive hope that Advanced Prostate Formula would at least relatively quickly bother or help me, and at best provide some useful help for some years. I am somewhat surprised to have found it to be pretty neutral so far, that is, with no obvious negative side effects, but also with no improvements that I am seeking. I plan to use up my single bottle and then either order more or request a refund.