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The cytotoxic activity at 48 h measured by MTT in the colorectal cancer cell lines SW480 and HT-29. Treatments with green coffee extract (GC) (A), toasted coffee extract (TC) (B), and CGA (C). Values are expressed as the mean ± SEM of at least three independent experiments. Two-way ANOVA, difference to non-treated cells, * p ≤ 0.05, ** p ≤ 0.01; ns: non-significant differences.
