According to Mark's post today, maca root may be a good option. I'm pretty curious. My sex drive first plummeted about 4 years ago, when i was 20. I think it was partially due to the SSRI's I was on, and continued anxiety and depression. This year has been the best (aside from the short "honeymoon period" I had with my current Boyfriend almost 3 years ago) for me since then, but it's still up and down, with no apparent correlation with diet or lifestyle changes. Of course, I'm not 100%. I've still got the constipation, anxiety, depression, and hormonal imbalances (low progesterone) to sort out. I'm hoping that supplementing Vitex will fix my progesterone and improve my sex drive, but I know it's really a combination of all of those things.