Some NAFLD biomarkers, such as fibroblast factor growth 21 (FGF-21) and CK18 fragment M30 (CK18-M30), and pro-inflammatory cytokines, tumor necrosis factor-α (TNF-α), leukotrienes 4, and prostaglandin E2, decreased after fish oil intervention in NAFLD/dyslipidemic patients. Here, FGF21 is linked to metabolic dysfunction-associated steatotic liver disease.