Validating Gulf War Illness Blood Biomarkers

This study aims to identify and validate blood-based biomarkers — measurable substances in the blood — that can reliably indicate Gulf War Illness (GWI). GWI is a chronic, poorly understood condition affecting many veterans of the 1990-1991 Gulf War, causing symptoms like fatigue, pain, cognitive difficulties, and gastrointestinal problems. Currently there is no reliable biological test for GWI, which makes diagnosis difficult and often delays appropriate care. Veterans aged 35 and older are eligible — both those who served in the Gulf War and meet recognised criteria for GWI, and healthy Gulf War-era veterans who serve as comparison controls. People are excluded if they have conditions like cancer, chronic infections, liver disease, lupus, multiple sclerosis, stroke, serious psychiatric illness, dementia, Parkinson's disease, or if they have been hospitalised in the past five years for alcohol or drug dependence, depression, or PTSD. Pregnant or nursing individuals are also excluded. Participants provide a blood sample and complete some cognitive and health assessments. No experimental treatments are involved. This research is significant because a validated biomarker for GWI could transform how the condition is diagnosed and treated, and potentially open pathways to better targeted therapies for the hundreds of thousands of veterans living with this condition.