The boxplots of plasma glucose levels (panel a), plasma insulin levels (panel b), HOMA-IR (panel c), and QUICKI (panel d) before and after supplemented with placebo or EGCG for 8 weeks in obese human subjects. *P < 0.05.
NP: non-parametric test; EGCG: epigallocatechin gallate; HOMA-IR: Homeostatic Model Assessment for Insulin Resistance; QUICKI: Quantitative Insulin Sensitivity Check Index.