Plays an important role in the formation of lipid droplets (LDs) which are storage organelles at the center of lipid and energy homeostasis (By similarity) (PubMed:18160536). Directly binds to diacylglycerol (DAGs) and triacylglycerol (By similarity). . This is the function of Ensembl gene identifier ENSG00000139914 (FITM1, fat storage inducing transmembrane protein 1).