Comparison of Antioxidant and Antiaging Activities Between Dragon Fruit (Hyloceureus polyrhizus (F.A.C. Weber) Britton & Rose) Rind Extract and Kaempferol

Abstract

Aging involves progressive physiological changes of the body, including skin dysfunction and death which can be accelerated by the presence of free radicals. Compounds with potential antioxidants and antiaging are contained in various fruits, including dragon fruit (Hyloceureus polyrhizus (F.A.C. Weber) Britton & Rose). This study aimed to compare the antioxidant and antiaging activities of dragon fruit rind extract (DFRE) and Kaempferol. The antioxidant and antiaging activities were measured by 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenger and inhibitory activity assay of tyrosinase, respectively and was conducted at the Biomolecular and Biomedicine Research Center, Aretha Medika Utama, from August to November 2018. Data acquired were then analyzed using ANOVA, followed by Post Hoc Test using Turkey HSD test with a confidence level of 95% (alpha=0.05). Phytochemical assay was also conducted to determine the content of active ingredients in thedragon fruit rind extract. Phytochemical test result showed that DFRE contained flavonoids, tannins, phenols, triterpenoids, and alkaloids compounds. Both DPPH scavenging and tyrosine inhibition assay indicated that Kaempferol compound also had antioxidant and antiaging activities. The IC50 values of DFRE and Kaempferol antioxidant activities were 164.98 mu g/mL and 83.30 mu g/mL, respectively, while the IC50 values of tyrosinase inhibition activity of DFRE and Kaemferol were 88.46 mu g/mL and 59.34 mu g/mL, respectively. DFRE had antioxidant activities and tyrosinase inhibition activities thus can be used as an alternative antiaging and antioxidant agents.