Nutrition for Chronic Daily Headache

Inclusion Criteria: * 18 years of age and older * either gender * meeting the 2004 International Classification of Headache Disorders (ICHD - II) criteria for the following forms of CDH (15 or more headache days per month and a headache history of more than two years with chronic migraine, transformed episodic migraine into CDH, chronic tension-type headache and new persistent daily headache) * under the care of a neurologist * willing and able to document headache characteristics and use of medications, as well as complete the assessment instruments * able to come in for 3 dietitian-administered dietary counseling sessions over 12 weeks * able to speak and understand English Exclusion Criteria: * analgesic rebound headache * hemicrania continua * drug-induced headache * post-traumatic headache * significant, symptomatic uncontrolled psychosis * undergoing current treatment for a major medical illness such as malignancy, autoimmune or immune deficiency disorder * pregnancy * clotting disorders * history of cranial or neck surgery within two years * vasculitis * chronic subdural hematoma * history of meningitis * history of subarachnoid or intracerebral hemorrhage * history of eating disorder * regular use of supplemental omega-3 fatty acids or gamma-linolenic acid