I've a friend who swears by St. John's Wort.
If the truth be known, St. John's Wort works like antidepressants do...by inhibition of the Tryptophan Pyrrolase (oxygenase) pathway. (see Badawy A.A. on medline)
Works for some. However, for me it definitely makes things worse, much worse, although SSRIs are highly beneficial. I'd advise caution for any of these and always try to have another person monitor your reaction.