Description: St. John's wort (Hypericum perforatum L.) is a long-living plant with yellow flowers. It contains many chemical compounds. Some are believed to be the active ingredients that produce the herb's effects, including the compounds hypericin and hyperforin. St. John's wort has been used for centuries to treat mental disorders as well as nerve pain. In ancient times, doctors and herbalists (specialists in herbs) wrote about its use as a sedative and treatment for malaria as well as a balm for wounds, burns, and insect bites. Today, St. John's wort is used by some people to treat mild to moderate depression, anxiety, or sleep disorders. St. John's Wort Extract Powder Spec.:0.3%Hypericinis We can supply large quantity of St. John's Wort Extract Powder with highly quailty and favourable price.