GPT and fatty liver disease: Intriguingly, the plasma levels of N-Me-6-PY and N-Me-4-PY presented dramatically positive correlations with various parameters that associated with hepatic steatosis and lipid metabolic disturbance, including body weight, oil red O positive area, plasma lipid parameters, ALT, and hepatic MDA, whereas displayed negative association with the hepatic GSH (Figure 2(l)), suggesting the potential pro-steatotic effect of N-Me-6-PY and N-Me-4-PY.