DESC: Headache Relief™ Supercritical FeverfewHigh potency californidine source from natural poppy extractsFull spectrum parthenolides from supercritically extracted feverfew, supporting normal cerebral vascular blood flow*Blocks the formation of inflammatory prostaglandins*25% naturally occuring salicylic acid extracted from nature's most effective herbal salicin sources A Supercritical New Chapter In Headache Relief New Chapter's Headache Relief™ provides a potent and effective herbal method for achieving relief from one of life's most common and unpleasant stressful experiences. Scientific research has clearly identified that the parthenolides within the feverfew flower have singular value in providing headache relief.* New Chapter’s exclusive supercritical CO2 extraction creates a uniquely high potency and stable parthenolide content enhanced with an array of nature's best recognized and synergistic herbs to promote comfort and release from the common headache.* For optimal multi-vi