A randomized clinical trial of 100 children with biopsy-confirmed NAFLD found that those who received 2000 IU of vitamin D daily for six months showed significant improvements in steatosis and lobular inflammation and reductions in aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels compared to placebo [142]. The gene discussed is GPT; the disease is steatosis.