Lysosomes contain about 60 enzymes, including many well-conserved lipases involved in fatty acid breakdown. Defects in lysosomal acid lipase A (LIPA) lead to several human lysosomal storage diseases, including Wolman disease, a disorder characterized by metabolic defects and death in childhood (4). In C. elegans, the LIPA homolog LIPL-4 is highly expressed in specific conditions that are linked to life-span extension (5, 6). However, the mechanism by which this enzyme modulates aging has remained elusive.