I wrote up a FAQ on Femaprin. It's in the 1st post on the Femparin Thread. Here is the basic question you ask, copied and pasted from the FAQ about Femaprin............
Why is Femaprin Vitex superiour to any other Vitex product available?
I believe it is better than other vitex products because it has 31 clinical studies backing it up, ect. (see quotes below) The once daily dose is also incredibly easy.
Quote from this link … http://www.cmbm.org/mind_body_medici...-Therapies.pdf “MR. BLUMENTHAL: Anyway, Chase Tree or Vitex agnus-castus used for PMS type complaints since Greco-Roman times. All of the research done by Commission E to review the material, almost all of the 34 clinical studies, 31 of those studies were all based on one product called Agnolyt® imported by Nature's Way as Femaprin®. Presumably other types of vitex products would work and be useful. But this is the one that is confirmed and documented in their clinical literature. “ This is a quote from the same paragraph in the previous question “ The secret of this preparation's success appears to be that it makes a tincture from the fruit of A. castus rather than from other parts of the plant, as most formulations do. “
You will not find another vitex product in the world, to my knowledge, that has been studied so extensivly (31 clinical studies). It is well-proven with lots and lots of positive studies. It is imported from Germany, and the very same vitex extract as Agnolyt, but has Nature's Way name on it.
Whats the difference with Femiprin & the regular Natures way Vitex?? 
