Scientific analyses of alleged Eucharistic miracles have found no physical evidence of human blood or tissue transformation, attributing observed discoloration to natural microbial and fungal contamination.
The claim asserts that bread and wine physically transformed into flesh and blood at Lanciano. The retrieved scientific literature evaluating Eucharistic miracle claims indicates that physical samples tested do not contain human blood or tissue, but rather show biological contamination, microbial pigments, or common bacterial antigens. Consequently, empirical scientific investigations refute the literal physical transformation claim.