For all my wondering buddies, here is the best site that I have found on vitex it is the German Commission E Monographs, which is actually like our FDA except for herbs. Here is the
website for vitex information . From what I am understanding, I will use my vitex tablets as an example.
My pills are 300mg with 10.5% so since I am suppose to have 50%-70% with 30mg-50mg. I would divide the 50% and the 70% by my pills 10.5%, coming up with 4.76 and 6.6 then multiply my answers by 30mg and 50mg coming up with 142.8mg - 333mg of my pills. Which comes out to be one of my pills.
Other web sites say to take anywhere between 90mg - 1200mg. I think it totally depends on the % that your pills are though as to how many pills you should take.
Hope this helps my vitex confused cysters (I was confused too after reading all the stuff I ran across):o