Purity >98%. Palmitoleic acid methyl ester is an ester version of palmitoleic acid , an ?-7 monounsaturated fatty acid that is a common constituent of the triglycerides of human adipose tissue. Palmitoleic acid-based diets raise low-density lipoprotein (LDL) cholesterol and lower high-density lipoprotein (HDL) cholesterol, even when dietary intake of cholesterol is maintained at a low level. Methyl esters of fatty acids are commonly used for the formulation of fatty acid-containing diets and dietary supplements.