By extension, taking into account the distributions and the measured values obtained (Table 1, Table 2, Table 3, Table 4 and Table 5), it can be said that vitamin D deficiency is associated with NAFLD and MS and the normalization of vitamin D is closely related to some parameters, such as BMI and ALT (also used as inclusion criteria), but especially AP, which seems to be a very strong reflection of NAFLD, as we suggested above. This evidence concerns the gene GPT and metabolic dysfunction-associated steatotic liver disease.