Results: Our data demonstrate that all the extracts behaved as MAO-A and MAO-B inhibitors, although to a different extent and enzyme inhibition mechanism; among them, the extract from L. ornithopodioides induced a decrease in MAO-A protein level in human AGS gastric adenocarcinoma and SH-SY5Y neuroblastoma cell lines. Here, MAOB is linked to neuroblastoma.