St. John’s wort does not improve symptoms of attention-deficit hyperactivity disorder

Attention-deficit hyperactivity disorder also known as A.D.H.D., affects thousands of children each year. Up to thirty percent do not respond to prescription medication or may experience an adverse reaction to certain drugs. Herbal supplements are often considered by some parents looking for a way to help their children. One of the most popular supplements is St. John’s Wort. But a new study finds it does not improve A.D.H.D. symptoms.