GPT and Alzheimer disease: Unlike alkaline phosphatase (ALP) and gamma-glutamyltransferase (GGT), which did not differ significantly between groups (p = 0.33 and p = 0.62, respectively), other liver enzymes were consistently higher in the non-AD group: GOT (non-AD: 42.63 ± 6.34 vs. AD: 27.05 ± 2.01 U/L; p = 0.017), GPT (30.42 ± 4.07 vs. 17.68 ± 2.14 U/L; p = 0.0064), and LDH (non-AD: 318.95 ± 30.0 vs. AD: 224.05 ± 13.24 U/L; p = 0.0043).