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Effects of Vit. C on cell viability in the AGS cell line. AGS cells were treated with Vit. C at the indicated dosages for 4 and 24 h, and cellular viability was subsequently measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Untreated cells were arbitrarily set as 100% control viability. The results are representative of three independent experiments, and values represent the mean ± standard deviation of three repeated experiments. **P<0.01. Vit., vitamin.
