Available in superior extended delivery, the aromatic plant Feverfew has been used since the Middle Ages. Nature's Plus Herbal Actives Feverfew leaf extract is uniformly standardized to a minimum of 0.7% (3.5 mg) parthenolide to guarantee that each & every capsule provides consistent potency & activity. Each capsule, providing the greatest concentration of active botanical principles, maximizes the synergistic benefits of the whole leaf, which naturally contains germacranolide parthenolide, 3-B-hydroxyparthenolide, seco-tanaparthenolide, canin, & artecanin. Ingredients: Feverfew (Tanacetum parthenium leaf) (standardized to 0.7% [3.5 mg] parthenolide)500 mg Di-calcium phosphate, microcrystalline cellulose, micro-gel cellulose, stearic acid, silica, magnesium stearate, & pharmaceutical glaze. These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.