I agree with the above posters re: St. Johns Wort. (Never heard of the other one.) I'm assuming you're not taking any prescribed meds. If so, most everything I've read on at least the ones I take specifically DO NOT TAKE this while taking prescribed me.
Also, as another poster said, St. Johns Wort is an herb, which is not regulated by the same standards prescribed meds are.
I have a good friend who is totally into fresh food, vegetarian, protein shakes, drinking "greens" and almost exclusively uses herbs for all kinds of health situations; BUT, she told me to not take herbs while on meds because they could interact badly.
One final idea, my T. and I were talking about meds when I was feeling overmedicated. She said I was going the "Western Way" of medicine and that "Eastern Methods" would be things like Yoga and acupuncture. If you're looking for something natural, I personally would be more comfortable with one of those two.
Just another opinion.