The Quick Environmental Exposure and Sensitivity Inventory (QEESI) is a validated screening questionnaire for chemical intolerance and the most widely used screening instrument available for personal use. Researchers and clinicians world-wide use the QEESI to document symptoms and intolerances of people who suspect they’ve been exposed and, therefore, TILTed. When taking the QEESI, people find the screener helpful for self-assessment. It’s also a useful tool for you to take to your doctor to explain your exposures and symptoms.