my prolactin levels in 2005 were 16.6 ng/mL and just a month ago 14 ng/mL. 0-14 is the reference range for the lab that did my most recent test. So as you can see i'm at the upper end of the reference range. I'm a male, and from my understanding, we don't need prolactin...for anything. It has benefits for stroke patients and some other things like that. anyways, i'm pretty sure it's causing my gyno, which is the nodular kind. Vitex agnus castus is the tech. name of the Chaste Berry Tree. supposedly it can be used to lower prolactin. doing a google search, found someone's post on a forum saying it made their levels go from 7.5 pg/mL down to 0.5 pg/mL ----------- cliffs: vitex a good natural prolactin solution?