Used in research settings to detect and quantify pepsin levels in biological samples such as saliva, sputum, or lung aspirates. Particularly valuable in studies related to gastroesophageal reflux disease (GERD) and aspiration in patients with respiratory conditions. The kit enables sensitive and specific measurement of rat pepsin, allowing researchers to investigate reflux mechanisms and lung injury in rodent models. Commonly applied in preclinical studies to evaluate the effectiveness of anti-reflux therapies or to assess airway damage due to gastric content aspiration.