Omega-3 Fatty Acids Therapy in Children with Nonalcoholic Fatty Liver Disease: A Randomized Controlled Trial

Objective To evaluate the efficacy and safety of omega-3 fatty acid supplementation in children with nonalcoholic fatty liver disease (NAFLD). Study design Overweight/obese children with NAFLD (n = 76; median age, 13 years; IQR, 11.1-15.2 years) were eligible to participate in the study. The diagnosis of NAFLD was based on elevated alanine aminotransferase (ALT) to >= 30% of the upper limit of normal (ULN) and liver hyperechogenicity on ultrasound. Patients were randomized to receive omega-3 fatty acids (docosahexaenoic acid and eicosapentaenoic acid, 450-1300 mg/day) or placebo (omega-6 sunflower oil). The primary outcome was the number of patients who demonstrated decreased ALT activity by $ 0.3 times the ULN. Secondary outcomes included alterations in liver function tests, liver hyperechogenicity, insulin resistance, and other metabolic markers after 6 months of intervention. Results Out of 76 enrolled patients, 64 completed the trial and were analyzed. After 6 months, we found no significant differences between the omega-3 and placebo groups in the number of patients with decreased ALT by >= 0.3 times the ULN (24 vs 23) or in median (IQR) ALT activity (48.5 [31-62] U/L vs 39 [27-55] U/L), liver hyperechogenicity, insulin resistance, or serum lipid levels. However, patients in the omega-3 group had lower levels of aspartate aminotransferase (28 [25-36] U/L vs 39 [27-55] U/L; P =.04) and gamma-glutamyl transpeptidase (26 [17.5-36.5] U/L vs 35 [22-52] U/L; P =.04), and significantly higher levels of adiponectin. Conclusion Omega-3 fatty acid supplementation did not increase the number of patients with decreased ALT levels and it did not affect liver steatosis on ultrasound, but it improved aspartate aminotransferase and gamma-glutamyl transpeptidase levels in children with NAFLD compared with placebo.