Fig 1: The level of thioredoxin reductase (TxnR) in human skin fibroblasts untreated (0) or pre-incubated (24 h) with OLE (5 and 25 µg/mL) or reference antioxidants (25 µg/mL) and exposed (or not exposed) to UVA (8 J/cm2). Mean values ± SD of three independent experiments is presented. Statistically significant differences vs. non-treated group (control); * p < 0.05; *** p < 0.001.