From Indiana Botanic Gardens, A Standardized Herbal Extract, Which Contains Only The Compounds Believed To Be Responsible For The Herb's Helpful Benefits. Conforms To The United States Pharmacopoeia Liquid Extracts Work Faster Than Other Forms Of Supplementation No Pills To Swallow, Herbs To Press Or Tea To Steep Alcohol Free Just Add To Water, Tea Or Juice And Enjoy Used For Migraine Headache. Standardized Herbal Extract Delivering 250 Mcg Of Parthenolide Per Day. Feverfew Is The Most Frequently Used Herb For The Long-Term Migraine Prevention. Continuous Use Of Feverfew May Reduce The Severity, Duration And Frequency Of Migraine Headaches.