In Vitro Antioxidant Properties of Lactobacillus gasseri Isolated from Fermented Milk: Isolation and Preparation of Strains and Intracellular Cell-Free Extracts, Chemical Testing (Hydrogen Peroxide, Superoxide, Hydroxyl Radical, DPPH, Ferrous Ion Chelati. Indonesian J. Sci. Technol. 2025;9(3):611-622. Accessed January 25, 2026. https://ejournal.kjpupi.id/index.php/ijost/article/view/391