The objective of the present study is to examine the impact of Salvia officinalis (sage) extract, a pharmaceutical product that has been extensively utilised and commercialised, on the antioxidant activity (SOD, CAT, and MDA) of the hemolymph of the invertebrate model organism Galleria mellonella L. (Lepidoptera: Pyralidae). For the aim of the study, an extract of S. officinalis was obtained from the transferred specimens. This was achieved by extracting the material using a soxhlet apparatus with 70% ethanol. Following the removal of the solvent through the utilisation of a rotary evaporator, the resultant dry matter was then diluted in 10% DMSO at concentrations of 0.1, 0.25, 0.5, and 1% to prepare the experimental solutions. These solutions were transferred to one of the samples for a period of 5 µl. Following the completion of the designated incubation period, the hemolymph was collected and utilised for the purpose of enzyme analysis. All experimental values of absorbances were determined at appropriate wavelengths by means of a microplate reader, the purpose of which was total protein determination. The experimental results were calculated by way of comparison with the total protein amount. During the experiment, 16 larvae were utilised. This experiment was performed in four replicates. The data obtained at the end of the study were evaluated using appropriate statistical tests. The study concluded that S. officinalis acts as a prooxidant at low temperatures, thereby triggering oxidative stress and inhibiting fragmentation by stimulating high levels of enzymatic defense (SOD). The treatment regimen has been demonstrated to exhibit bidirectional (hormetic) action strategies in in vivo insect models, depending on its complex phenolic structure.