Product name: St John's Wort Extract Specification: Hypericins (UV) 0.3% Testing method : UV Appearance: Brown Black powder Plant Source: St John's Wort St. John's wort (Hypericum perforatum), a common shrub-like perennial, bears bright yellow flowers that contain numerous therapeutic substances when dried. Europeans have used the herb for centuries to calm jangled nerves and heal wounds, among other ills. And so it's not surprising that North Americans have recently embraced its use as a treatment for depression and conditions associated with it. Not only is St. John's wort effective and relatively free of side effects, it also costs under $20 for a month's supply, about 75% less than the most popular antidepressant drugs. In Germany, where doctors routinely prescribe herbal remedies, St. John's wort is the most common form of antidepressant--more widely used than the drugs Prozac or Zoloft because it has far fewer side effects Distribution: Jiangsu,Shandong,Shanxi,Jiangxi,Guizhou Prov., China Storage: Well-closed container , in a cool place. Shelf life: The guarantee period is 24 months when properly stored Packing: In cardboard drum lined with 5kg/aluminum foil bag,25kg/ Fibre drum,with plastic bag inside or upon client's request. Solubility: soluble in water. Active ingredients: Hypericin Molecular Formula :C30H16O8 Molecular Weight :504.46 CAS Number:548-04-9 Hyperforin Molecular Formula :C35H52O4 Molecular Weight :536.79 CAS Number:11079-53-1 Medical Function: treatment for depression Traditional Chinese medicine : Being used in mild moderate depression nerve pain, anxiety, or sleep disorders, as antipyretic, for arresting bleeding, burns and scalding.