C3 and metabolic dysfunction-associated steatotic liver disease: Complex non-invasive biomarkers include FibroTest/FibroSure, fibrospect, enhanced liver fibrosis panel (ELF), pro-C3 based predictive fibrosis score, and NIS4 for patients with NAFLD and the PGA index, PGAA index, FirboTest/FibroSure, and ELF for patients with ALD.