GPT and diabetes mellitus: As shown in Figure 5A, a Pearson correlation heatmap was generated, where the columns represent selected proteins and metabolites with significant differential expression, and the rows correspond to key clinical indices, including BMI, blood lipid profiles (TG, HDL, LDL, TC), liver enzymes (ALT, AST), renal function markers (creatinine, urea nitrogen), glucose metabolism, and clinical histories (e.g., MASLD, diabetes) (Supplementary Table S7).