This study aimed to compare the effect of red dragon fruit extract (Hylocereus polyrhizus) and white dragon fruit extract (Hylocereus undatus) to total cholesterol levels in white rats (Rattus norvegicus). Total of 30 males white wistar strains were divided into five treatments i.e: (1) standard feed and Na-CMC 1% (K1), (2) standard feed and quail egg 10ml/kgBW (K2), (3) standard feed, quail egg 10ml/ kgBW and simvastatin dose 0,72mg/day (P1), (4) standard feed, quail egg 10ml/kgBW and red dragon fruit extract dose 60mg/200gBW/day (P2), (3) standard feed, quail egg 10 ml/kgBW and white dragon fruit extract dose 120mg/200gBW/day (P3). The intervention was carried out for 14 days after 7 days acclimatization period. Data was analyzed by One Way ANOVA test and continued with Post Hoc Bonferroni test (p=0.05). In P2 group, there was a difference of total blood cholesterol level by 25.83 mg/dl compared with the positive control group and statistically significant (p<0.05). In P1 and P3 group there were difference in cholesterol levels of 9.5 mg/dl and 11.5 mg/dl compared with the positive control group, but not statistically significant (p>0.05). The comparison between red dragon extract group and white dragon extract showed a non-significant difference (p>0.05). Red dragon fruit extract and white dragon extract have a potential effect to improve hypercholesterolemia conditions.

This study aims to prove that the administration of red dragon fruit extract (Hylocereus polyrhizus) has an effect on membrane lipid peroxidation and liver tissue damage triggered by hyperlipidemia in white rats (Rattus norvegicus). This study used trueexperimental design with using 30 male Wistar rats which were divided into 5 groups. Group K1-K4 was given treatment for 8 weeks and group K5 for 16 weeks. The group consists of K1 negative control (standard diet); K2 positive control (standard diet and quail eggs 10 ml / kgBW); K3 (standard diet, quail eggs 10 ml / kgBW and simvastatin 0.72 mg / day); K4 (standard diet, quail eggs 10 ml / kgBW and red dragon fruit extract dose 60 mg / day) for 8 weeks and K5 (standard diet, quail eggs 10 ml / kgBW and red dragon fruit extract dose 60 mg / day) for 16 weeks. Data was analyzed by One Way ANOVA test, followed by the Wilcoxon Man-Whitney Post Hoc test (P-value <0.05) in 8 weeks treatment. K3 and K4 groups showed improvement in MDA concentration and improvement of liver tissue (P-value <0.05) compared to K2. Red dragon fruit extract 60 mg/day has a potential effect in repairing lipid peroxidation damage on liver cell membrane in hyperlipidemia conditions with high fat diet.

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