Nature"s Herbs Feverfew Leaf Description: Tanacetum Parthenium. Nature"s Herbs premium Feverfew leaf is grown on select farms. Only the correct subspecies of Feverfew are propagated to insure the highest concentration of active ingredients in the product. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease. • Nature"s Herbs Feverfew Leaf Directions As an addition to the daily diet, take 2 capsules 3 times daily with a large glass of water. Do not use if you are pregnant or nursing. Supplement Facts Serving Size: 1 Capsule Servings Per Container: 33 Amt Per Serving % Daily Value Feverfew Leaf (tanacetum parthenium) 384 mg * *Daily value not established. • Premium Feverfew Leaves.