We studied the system of lipid peroxidation (LP) and system of antioxidant protection (AOP) in 33 patients with gastroesophageal reflux disease (GERD) and 25 patients with GERD combined with duodenal ulcer. The high activation of LP took place against AOP disbalance. The system of lipid peroxidation and system of antioxidant protection may be used as a supplementary test of treatment quality of the patients with acid-dependent disease.
