Tea Polyphenols EGCG and Theaflavin Inhibit the Activity of SARS-CoV-2 3CL-Protease In Vitro

Figure 7

Cytotoxicity of EGCG and theaflavin. EGCG and theaflavin did not have significant cytotoxicity up to 40 μg/ml. HEK293T cells were incubated with either EGCG or theaflavin for 24 h, and the MTT assay was performed to evaluate the cytotoxicity.