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values for DPPH free radicals for pyrogallol and caffeic acid were determined to be 76.26 μg/mL and 106.31 μg/mL, respectively. Notably, pyrogallol and caffeic acid exhibited higher antioxidant activity in all assays than catechin. In most assays (DPPH, Lipid peroxidation, and PCO) and at high concentrations (50 and 100 μg/mL), the antioxidative stress activity of pyrogallol was higher than that of caffeic acid. In conclusion, this study's results suggest that these compounds can potentially ameliorate diseases associated with oxidative stress.
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Bahramikia et al. (2025) studied this question.
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