The function of LDAH (lipid droplet associated hydrolase, Ensembl gene identifier ENSG00000118961) is as follows. Probable serine lipid hydrolase associated with lipid droplets (By similarity). Has low cholesterol esterase activity (By similarity). Appears to lack triglyceride lipase activity (By similarity). Involved in cholesterol and triglyceride homeostasis; has opposing effects, stimulating cellular triglyceride accumulation and cellular cholesterol release (PubMed:24357060, PubMed:28578400). Acts antagonistically with PNPLA2/ATGL in regulation of cellular lipid stores (PubMed:28578400). May regulate triglyceride accumulation indirectly through stimulation of PNPLA2/ATGL ubiquitination and proteasomal degradation (PubMed:28578400). Promotes microtubule- dependent lipid droplet fusion (PubMed:28578400). Highly expressed in macrophage-rich areas in atherosclerotic lesions, suggesting that it could promote cholesterol ester turnover in macrophages (By similarity). {ECO:0000250|UniProtKB:Q8BVA5, ECO:0000269|PubMed:24357060, ECO:0000269|PubMed:28578400}.