ArticleViewAbstractPharmacognosy Journal,2015,7,3,198-204.Published:09th Mar, 2015Type:Original ArticleDynamic Comparison of Free Radical Scavenging Abilities of Hypericum Perforatum L., Herba Verbenae Officinalis, and Valeriana Officinalis L. ExtractsYi-ming Li, Yan-Ru Liu, Bing-Kun Xiao, Jian-Yun Yang, and Rong-Qing Huang Yi-ming Li1,Yan-Ru Liu2,3, Bing-Kun Xiao2, Jian-Yun Yang2, Rong-Qing Huang2* 1Anhui Medical University,Hefei 230032, P. R.China;2Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P.R. China;3The School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenhe District, Shenyang 110016, P.R. ChinaAbstract:Objectives: The purpose of this research was to compare the dynamic antioxidant activities and the free radical scavenging abilities of three botanical supplements, Hypericum perforatum L. (HPL), Herba Verbena Officinalis (HVO), and Valeriana officinalis L. (VO), which have been reported to effectively treat menopause symptoms. Methods: The antioxidant activities of the three supplements were determined by the ferric reducing ability of plasma (FRAP) assay. In addition, their free radical scavenging abilities were studied by ftheir interactions with the stable radicals of 2, 2’-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) and 2,2-diphenyl-1-picrylhydrazyl (DPPH). Results: The results indicated that the HPL ethanolic extract exhibited greater antioxidant activity (1.2688 ± 0.01 mmol Trolox/g) than the HVO ethanolic extract (1.1686± 0.043 mmol Trolox/g) and the VO ethanolic extract (0.2579 ± 0.0031 mmol Trolox/g) as compared to Nilestriol (0.0026±0.0012), a positive control agent in the experiment. Moreover, the HPL extract showed remarkable free radical scavenging activity against ABTS•+, and the HVO extract was the most potent against DPPH•. Conclusion: These activities may be attributed to the total flavonoid or phenolic acid contents of among these extracts.Key words: ABTS•+, DPPH•, Hypericum perforatum L.,Herba Verbena Officinalis, Menopause Oxidative Stress, Valeriana officinalis L.Keywords:ABTS•+, DPPH•, Herba Verbena Officinalis, Hypericum perforatum L., Menopause Oxidative Stress, Valeriana officinalis L.