Figure 4: Principal component analysis of each groups. Note: Each colored point represents a sample. The first, second, and third principal components are displayed on the X, Y, and Z-axis, respectively. These three components represent the largest fraction of the overall variability. Red ball: Control group; blue ball: Model group; brown ball: Triterpenes high dose group; green ball: Triterpenes middle dose group; gray ball: Triterpenes low dose group.