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Table 2 Antioxidant potential and the TPC of the EA extract of the Sri Lankan TBQ

From: The Porphyromonas gingivalis inhibitory effects, antioxidant effects and the safety of a Sri Lankan traditional betel quid - an in vitro study

Extract/Positive control DPPH radical scavenging activity (IC50: μg/ml) ABTS radical scavenging activity (mg of trolox equivalents /g of DW) Ferric reducing antioxidant power (mmol of ferrous equivalents /g of DW) Phenolic content (mg of gallic acid equivalents /g of DW)
TBQ extract 20.6 ± 1.8 624.8 ± 8.5 3688.9 ± 223.8 114.0 ± 1.3
Ascorbic acid* 4.2 ± 0.1 1263.8 ± 39.0 8068.4 ± 62.3
Trolox* 6.3 ± 0.1 5176.8 ± 33.0