GPT and Parkinson disease: The model also identified numerous interactions with blood and urine biochemical levels, indicating elevated ALT in MND and MG, but decreased in AD and PD; sharply decreased apolipoprotein A in AD and MND, but more modest decreases in PD and MG; increases in calcium and cholesterol in AD, MND, and MG, but changes in these molecules not being significant in PD; decreases in LDL and phosphate in any disease, but most strikingly in MG and MND, respectively; and increases in sodium and testosterone in all diseases.