A short story: two yrs ago I was diagnosed with PCOS. I was placed on birth control pills which were not tolerated by my body at all. My OBGYN then suggested Prometrium to counter the likelihood of endometrial cancer later which I accepted but didn't take until I researched natural remedies and herbs. Peoney, horsetail, dong quai, licorice, fo-ti amongst others brought me to Rainbow Light Advanced. It's a perfect blend of herbs and minerals that keeps you feeling great. After not menstrating for a year because of my PCOS, my periods are now regulated thanks to Rainbow Light Advanced. I can't remember the last time I wrote a recommendation for anything but this is something I feel very strongly about. Make the investment in this supplement.