This study collects exhaled breath condensate samples from healthy populations and hyperlipidemic populations, analyzes the characteristics of the exhaled metabolic lipid profile for early identification of people with abnormal blood lipids, verifies the feasibility and accuracy of a new gas detection method for screening abnormal blood lipids, and explores a simple, fast, and non-invasive method for screening abnormal blood lipids.

Inclusion Criteria:

1. Age ≥ 18 years
2. Voluntarily sign the informed consent form

Exclusion Criteria:

1. Patients with lung cancer, asthma, chronic obstructive pulmonary disease, cystic fibrosis, or acute respiratory distress syndrome
2. Women during pregnancy or breastfeeding
3. Patients with chronic kidney disease (GFR <60 ml/min) or liver cirrhosis
4. Individuals unable to cooperate in collecting exhaled breath samples

Healthy population, population with hyperlipidemia