St. John's Wort is an herbaceous perennial plant growing to approx. 60 to 90 cm height with gold-yellow flowers and sheets with reddish-brown points, which contain the red oil that produce the herb's effects, including the compounds hypericin and hyperforin. It is used as a natural antidepressant, usually as excerpt in alcoholic solution, because of its tendency-lightening effect against fears, depressions and internal unrest. An effect is obtained only retarded after 10 to 14 days. As adverse effect stomach intestine complaints, allergic skin reactions and increased light sensitivity are indicated.