The function of ENSG00000138744 (NAAA, N-acylethanolamine acid amidase) is as follows. Degrades bioactive fatty acid amides to their corresponding acids, with the following preference: N-palmitoylethanolamine > N- myristoylethanolamine > N-lauroylethanolamine = N-stearoylethanolamine > N-arachidonoylethanolamine > N-oleoylethanolamine (PubMed:15655246, PubMed:17980170, PubMed:18793752, PubMed:22825852, PubMed:30301806). Also exhibits weak hydrolytic activity against the ceramides N- lauroylsphingosine and N-palmitoylsphingosine (PubMed:15655246). {ECO:0000269|PubMed:15655246, ECO:0000269|PubMed:17980170, ECO:0000269|PubMed:18793752, ECO:0000269|PubMed:22825852, ECO:0000269|PubMed:30301806}.