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The toxicity of green and black teas in vitro. The RSC96 cells were treated with 1, and 2, 3, 4, and 5 mg/mL of green (A) and black (B) teas and H9c2 cells were treated with 0.125, 0.25, 0.5, 1, and 2 mg/mL of green (C) and black (D) extracts for 72hs. In the linear regression analysis, the levels of tea polyphenol contents in the each tea sample (5 g/100 ml) are significantly correlated with each IC50 concentration in both RSC96 (E) and H9c2 (F).
