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. 2015 Sep 21;5:14048. doi: 10.1038/srep14048

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Levels of total phenolics (A) and flavonoids (B) from root extracts. (C) curve for DPPH free radical scavenging. (D) Trolox equivalent antioxidant capacity. Values followed by **within a column are significantly different from the control at p < 0.01.