The aim of this study was to determine the biofunctional effects of aronia extract and its microencapsulated form on lipid metabolism and liver tissue in rats fed a high-fat diet. In the study, 42 male Sprague-Dawley rats aged 10 weeks were used. The rats were divided into 6 groups with 7 animals in each experimental group. Experimental groups; 1- Standard diet control (CON), 2- High fat diet control (HF), 3- HF + 400 mg/kg aronia extract (HF400E), 4- HF + 200 mg/kg aronia extract (HF200E), 5- HF + 400 mg/kg aronia encapsulated (HF400C), and 6- HF + 200 mg/kg aronia encapsulated (HF200C). From the 10th week to 20 weeks, rats were fed with HF for 10 weeks except (CON). At the end of 20 weeks, rats fed HF were administered aronia extract and its encapsulated form (200-400 mg/kg) by oral gavage for 6 weeks. After six weeks of treatment, biochemical analyses were performed in blood and tissue samples of the rats. Liver histology was evaluated. As a result of the study, high-fat diet significantly increased serum ALT, AST, TC, TG and LDL-C levels and hepatic MDA levels, whereas administration of HF400E to hyperlipidaemic rats caused a significant decrease in the levels of these parameters. Furthermore, histopathological analysis of liver sections revealed that HF400E treatment also protected against liver injury. These results indicated that HF400E improved lipid profiles, inhibited lipid peroxidation and played a protective role against liver injury in hyperlipidaemic rats. The lack of a significant effect in the encapsulation of aronia may be due to the short duration of treatment. It should be taken into consideration that future studies should be carried out for longer periods (>6 weeks) and at higher doses.