The effect of Lippia citriodora extract on selected blood parameters and on plasma oxidative markers in Avelignese horses was evaluated. Twenty-four horses were divided into three groups, consisting of eight animals each. Results of two experimental groups, 0.5mg of verbascoside per kg of metabolic body weight (bw0.75 ) in the low-dose group (LVB) and 1.0mg of verbascoside per kg of metabolic body weight (bw0.75 ) in the high-dose group (HVB), were compared to the control group (CON). Groups fed L.citriodora extract (HVB and LVB) showed a significant decrease in triglycerides, total cholesterol and LDL cholesterol (p<.01), bilirubin, and transaminases (p<.05), and an increase in HDL cholesterol (p<.01) compared to the CON group. Oxidative status was improved due to significant decrease in plasma concentration of ROMs and TBARS (p<.01) and increase in levels of vitamin A and vitamin E (p<.01). Based on obtained results, it is assumed that dietary supplementation with L.citriodora extract might find a useful application in horse feeding, with positive impact observed in blood parameters and plasma oxidative markers, with beneficial effects on the physiological welfare of livestock animals.