The objective of this clinical trial is to evaluate the anti-pollution effects of AP green tea extracts in subjects with discomforts related to the respiratory system by prolonged exposure to particulate matter in air pollution

Inclusion Criteria:

• Subjects aged 19 years or over
• Subjects with discomforts related to the respiratory system by prolonged exposure to particulate matter in air pollution
• Subjects who voluntarily decide to participate in this clinical study and sign the informed consent form on their own or through their representatives

Exclusion Criteria:

• At the screening visit, subjects who were diagnosed with acute or chronic respiratory disease and undergoing medication.
• Subjects who were diagnosed with ventricular associated disease, unstable and uncontrolled chronic medical disease, or active malignant tumor and undergoing medication within 4 weeks prior to the first administration of the investigational product
• Subjects who show a level of ALT/AST of 2 times or more the upper limit of normal as a result of a screening test and have acute or chronic hepatitis or known liver cirrhosis
• In addition to the above, subjects who are determined to be ineligible to participate in the clinical study according to the investigator's medical opinion