A recent study [19] showed that only 6 days of a LCKD were able to decrease the intrahepatic TG content of NAFLD individuals by 30%, and markedly improve insulin sensitivity which was determined by decreases in fasting serum glucose and insulin (−13% and −53%, respectively), C-peptide concentrations (−36%) and HOMA-IR (−57%). Here, INS is linked to metabolic dysfunction-associated steatotic liver disease.