Lipase breaks down lipid into its components: glycerol and fatty acids. Maltose is a kind of sugar and therefore, carbohydrate. Carbohydrate, lipid and protein are three of the biological macromolecules, alongside nucleotides that make up DNA. When enzymes are heated, they denature and their shape changes. They no longer able to bind to lipid and break them down. Result would be less effective digestion of lipid and oily faeces might appear since the undigested lipid will be excreted.