St. John's Wort is a mood elevator. After about 15-30 days you should feel a bit uplifted, less blue. Good for depression. :) It takes awhile for it to take effect. If you want a more immediate effect, gotu kola and gingko biloba are better - several recipes in the Herbal Elixers post have to do with mood for those nights we just want to feel more peaceful yet alert. :)