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 Chelatin. Indones. j. sci. technol. 2024;9(3):611-622. Accessed June 7, 2026. https://ijost.upi.edu/index.php/ijost/article/view/421