People have been using herbs to fight disease and promote wellness since prehistoric times. In recent years, science has gotten into the act and amassed quite a respectable body of evidence to support what healers the world over have been saying for centuries - herbal remedies work. Experiencing the heartbreak of psoriasis? A little dandelion root can clear it up. Grandpa's sciatica acting up again? St. John's Wort ought to put the spring back in...