MCT (Medium-Chain Triglycerides)
The fatty acids in coconut oil and breast milk that bypass the lymphatic system and go directly to the liver for rapid energy — unlike any other dietary fat.
— Definition
Medium-chain triglycerides (MCTs) are dietary fats with carbon chain lengths of 6–12 carbons (caproic C6, caprylic C8, capric C10, and lauric C12). They are metabolised differently from long-chain fats: absorbed directly into the portal vein (not lymphatics), transported to the liver, and rapidly converted to ketones.
— In Detail
MCT metabolism: Long-chain fats require bile emulsification, re-packaging into chylomicrons, and transport through the lymphatic system — a 3–4 hour process. MCTs are absorbed directly like carbohydrates, producing energy in 30–60 minutes. They do not require carnitine for mitochondrial transport (unlike long-chain fats). Virgin coconut oil is 65% MCTs: lauric acid (C12, 47%), caprylic acid (C8, 7%), capric acid (C10, 8%). Lauric acid converts to monolaurin in the body — the same compound found in breast milk with documented antimicrobial activity against enveloped viruses (influenza, HIV), bacteria (S. aureus, H. pylori), and fungi (Candida). Important: lauric acid is classified as an MCT by some but not others — its metabolism is partially intermediate between MCT and LCT.
— Why It Matters
Virgin coconut oil's MCT profile explains why Kerala's traditional coconut-oil-heavy diet does not produce the cardiovascular disease burden that saturated fat theory would predict. Populations consuming traditional unrefined coconut oil as a primary fat show favourable lipid profiles — a result increasingly explained by MCT metabolism versus LCT metabolism.
— Related Terms
— See in Field Guide
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