St. John's wort (Hypericum perforatum) is a flowering shrub native to Europe. People use St. John's wort to treat depression and menopausal symptoms. Several studies support the therapeutic benefit of St. John's wort in treating mild to moderate depression. In fact, some research has shown the supplement to be as effective as several prescription antidepressants.
Chemicals in St. John’s wort, like hypericin and hyperforin, can provide sedative effects that work to lessen anxiety and reduce irritability
Taking St. John's wort alone or in combination with black cohosh or other herbs might reduce menopausal symptoms such as hot flashes.
St. John’s wort can help speed healing of wounds and burns, thanks to the plant’s antimicrobial and anti-inflammatory properties, as well as its ability to stimulate collagen production.
St. John's wort can be effective for treating mild to moderate depression. However, the supplement interacts with many medications and can cause serious side effects. Consult with your doctor before taking St. John's wort if you take any other medications.