Latin Name: Tanacetum parthenium Feverfew leaves standardized to .7% Parthenolide and dosed according to the studies at the London Migraine clinic. Usage: Feverfew helps maintain normal blood vessel tone. Parthenolide also helps normalize the functions of platelets in the blood system by inhibiting platelet aggregation, reducing seratonin release from platelets and blocking the formation of pro-inflammatory mediators.* Recommended Daily Dosage: Take one capsule daily with water during a meal. Best results are obtained with continuous use. Serving size - 1 capsule: Feverfew Leaves 370 mg, Feverfew, dried extract 80 mg, from Nature's Way.