Figure 4From: Antioxidant and cytoprotective activities of Piper betle, Areca catechu, Uncaria gambir and betel quid with and without calcium hydroxide Cytoprotective effects of the extracts against hydrogen peroxide-induced oxidative stress cells. Values are expressed as means ± SD (n = 3). Ascorbic acid was used as positive control. *Significant difference within the same samples at p < 0.05 (t-test). **Significant difference when compared to H202 at p < 0.05 (t-test).Back to article page