St John’s wort is a native European plant with a long history, dating back to the times of Dioscorides and Hippocrates. It is also called hypericum and has been used to treat nervous disorders since the time of the Swiss physician Paracelsus (1493-1541). In recent years, clinical trials have shown that St John’s wort can assist significantly in the management of mood swings, which supports its traditional nervine uses. In fact, it is one of the best-known herbs for treating nervous conditions. The therapeutic dose helps relieve symptoms of anxiety, nervous unrest, restlessness and sleeplessness.