Now Foods, St. John's Wort, 300 mg, 250 CapsProduct Description St. John's Wort (Hypericum perforatum) is a perennial plant that has been used for centuries for its mood supporting capabilities. NOW St. John's Wort is carefully harvested, dried, and processed to give you the highest quality herb in a convenient capsule form. Each serving provides a potent dose of this herbal supplement, traditionally known to act as a natural mood enhancer. NOW Foods ensures that only the best quality herbs are