GLOSSARY

Derived Lipids traditionally describes lipid products such as fatty acids and certain alcohols, or related compounds, with source-dependent boundaries.

Traditional simple, compound and derived lipid categories are teaching tools and do not map perfectly onto every modern classification. Compound and complex often overlap or function as synonyms. Understanding an individual member requires its actual structure and attached groups rather than inferring component number or nutritional effects solely from a category name.

Much dietary triglyceride is hydrolysed by intestinal lipases into fatty acids and monoacylglycerols. Bile assists dispersion and micelle formation but is not itself a fat-cleaving enzyme. Products enter intestinal cells, where many long-chain fatty acids are reassembled into lipids. Absorption does not simply mean moving intact dietary molecules into blood.

An ester bond joins a fatty acid's carboxyl group to an alcohol group and can be cleaved by hydrolysis. It differs from a double bond within the chain: ester cleavage does not inherently saturate the chain. Making and breaking these linkages supports storage and release, but the distinct reactions should not share interchangeable names.