Used in traditional herbalism for centuries, recent scientific research has made St. John's Wort one of Europe's most popular herbal products. Provides a concentrated and standardised extract of this popular herb. (Before taking this product please check with your doctor or pharmacist if you are taking any prescribed medicines as St. John's Wort may affect the way they work.)PLEASE NOTE: THIS PRODUCT IS NOT AVAILABLE TO CUSTOMERS IN THE REPUBLIC OF IRELAND.. Take one capsule three times daily, preferably with meals. Do not exceed stated dose. Search our wide range of herbal products from Nettle to Tumeric. You'll be sure to find the herbal product you're looking for at Holland and Barrett.