Xi’an Biosep- St. John’s Wort P.E.[Source] the whole herb of Hypericum perforatum L.[Specification] Hypericins 0.3%[Analysis Method] UV[Usage] The hypericin is an active ingredient extracted from St John’s wort. It can cure depression, relieve cough, relieve pain and protect liver. The hypericin can inhibit nerve center and can be used as anti-depression medicine.