When steeped in oil and applied to the skin, it helps heal wounds and burns. Research suggests it may also be useful in treating infections caused by viruses. St. John's wort reduces symptoms of depression in people with mild to moderate forms of the condition. Seasonal affective disorder. Used alone, St. John's wort improves mood.
Effects are even greater when the herb is used in combination with light therapy.
Other mood problems. St. John's wort helps reduce anxiety, listlessness, and feelings of worthlessness. Wounds and burns. In forms that can be applied to the skin, St. John's wort reduces pain and inflammation and promotes healing. Plant Description St. John's wort is a shrubby plant with clusters of yellow flowers.