TY - JOUR AU - Chand, Ranish Nitesh AU - Gopalan, Romila Devi AU - Christi, Ketan PY - 2017/10/30 Y2 - 2024/03/28 TI - Evaluation of Antioxidant Properties in Thirteen Fijian Medicinal Plants Used in Alzheimer’s Disease and Related Illness JF - Free Radicals and Antioxidants JA - Free Rad. Antiox. VL - 8 IS - 1 SE - Original Article DO - 10.5530/fra.2018.1.3 UR - https://www.antiox.org/index.php/fra/article/view/75 SP - 11-17 AB - <p><strong>Objective:</strong> The present study aims to evaluate antioxidant properties of decoction and ethanol extracts of Fijian medicinal plants using 2,2-diphenyl-1-picryl-hydrazyl (DPPH) scavenging assay. <strong>Method:</strong> Thirteen plant species belonging to Melastomataceae, Asteraceae, Apiaceae, Rutaceae, Goodeniaceae, Loganiaceae, Araliaceae, Solanaceae, Polygonaceae, Zingiberaceae and Anacardiaceae families were tested at 0.2 mg/mL, 0.4 mg/mL, 0.6 mg/mL, 0.8 mg/mL, 1.0 mg/mL, 1.5 mg/mL and 2.0 mg/mL concentrations for antioxidant properties. The antioxidant capabilities were compared with ascorbic acid standard.<strong> Results and Discussions:</strong> Among the decoction and ethanol extracts tested, all plants showed DPPH scavenging activity. The most potent antioxidant activity was seen in <em>C. hirta</em> with an IC<sub>50</sub> value of 0.64 mg/mL. The activity of<em> C. hirta</em> was twofold more potent than the standard ascorbic acid (IC<sub>50</sub> = 1.33 mg/mL) indicating that polar extracts of <em>C. hirta</em> contains compounds with relatively better antioxidant properties than ascorbic acid.<strong> Conclusion:</strong> The plant extracts used in this study were crude extracts, as it is envisaged that if the phytochemicals were isolated and purified from these plants, more prominent results could be expected. These plants could prove leads to safer and better candidates for the future selection of antioxidant.</p> ER -