I've been taking vitex for a long time w/no clear effect and a lot of confusion!!! I started out assuming that the dosage on the bottle of capsules (40 mg) was correct. Then, when I bought the next bottle, it said dosage was 100 mg. Then, I bought THE SAME BRAND as the previous time, and they'd upped their dosage to 400 mg without explanation!!! (Maybe it was a misprint when they redesigned the label? The capsules seem exactly the same, and dosage is still 1 capsule/day.)
Most herbal references I've found don't mention dosage at ALL.
: The only references I or my midwife could find said 30-50 mg/day but of alcohol extract; we weren't sure whether that would be the same for capsules. Finally I bought the extract and have been taking ~40 mg/day of that...but the label on that says to take 2,000 mg/day!
Anyway, I felt encouraged when I O'd and bled 3 months after I started taking vitex, which is about as long as everyone says it takes to start working. It happened again after 2 months, which is not too bad by my standards. But nothing's happened since then, except that after 2 months my estrogen level went up and stayed up, but I'm not pregnant. It's now 6 weeks later, and I'm taking progesterone to induce a period just to get things going again.
I don't know if it's not working because I was taking too much, or if vitex can't fix what's wrong w/me. Advice on dosage would be much appreciated!!!