Lauric acid is characterized as which type?

• A. 4 carbon atoms, short chain fatty acid
• B. 12 carbon atoms, medium chain fatty acid
• C. 18 carbon atoms, long chain fatty acid
• D. 20 carbons and above, very long chain fatty acid

Answer: (B)

Fatty acids are categorized by how many carbon atoms their chain contains, which influences how they are absorbed and metabolized. Lauric acid has twelve carbon atoms, placing it in the medium-chain fatty acids group. MCFA (roughly six to twelve carbons) are absorbed directly into the portal circulation and rapidly oxidized in the liver, unlike longer chains that are more often packaged into chylomicrons and stored or used more slowly. Lauric acid is commonly found in coconut oil and palm kernel oil and shares these MCFA characteristics. The other described chain lengths correspond to short-chain (four carbons), long-chain (eighteen carbons), and very long chain (twenty or more), which is why lauric acid is categorized as a medium-chain fatty acid.