Post-incubation with GTE recovers osteoblast viability and reduces ROS production after induction of oxidative stress. Osteoblasts were treated for 1 h with 1 mM H2O2 followed by the stimulation with GTE for 4 h. Cell viability was measured via MTT assay (A). For flow cytometry, the osteoblasts were treated for 15 min. with H2O2 and stimulated with GTE for the next hour (B) (N = 3, n = 2). Bars represent mean ± s.e.m. ***p < 0.001 (ANOVA/Bonferroni).