Specifically for CYP/sEH metabolism, the partial least squares discriminant analysis performed on the samples found higher levels of 9,10-EpOME and 12,13-EpOME in the cerebrospinal fluid and a decrease in the ratio of 12,13-DiHOME/EpOME in the plasma in the AD group compared to the control group (Borkowski et al., 2021). Here, PPIG is linked to Alzheimer disease.