GPT and type 2 diabetes mellitus: Figure 3 shows that the levels of TG, TC, AST, LDL, and ALT in T2DM mice were extraordinary upregulated compared with the NC and NCPC groups, indicating that the aberrant blood biochemical index in diabetic mice was caused by liver metabolism failure. After phycocyanin administration, the contents of TG, TC, AST, and ALT in the TLPC and THPC groups were significantly decreased compared with the T2DM mice. Although there was no obvious difference in LDL between the phycocyanin treatment and T2DM groups, its content in the THPC and TLPC groups was slightly reduced, as shown in Figure 3.