Monolaurin
The antimicrobial compound formed when the body metabolises lauric acid from coconut oil — and the reason coconut oil and breast milk share the same primary fatty acid.
— Definition
Monolaurin (glycerol monolaurate) is a monoglyceride formed in the body when lauric acid (a C12 fatty acid) is metabolised. It is the primary antimicrobial compound in human breast milk and is formed when coconut oil's lauric acid (47% of total fat) is digested.
— In Detail
Monolaurin's antimicrobial mechanism: acts on the lipid bilayer of enveloped pathogens — viruses (influenza, RSV, HIV, herpes), bacteria (S. aureus, H. pylori, Listeria, C. difficile), and fungi (Candida albicans). By solubilising and disintegrating the lipid coat of these pathogens, monolaurin prevents their entry into host cells. Importantly: monolaurin does not harm commensal gut bacteria (which are protected by their cell walls), making it a selective antimicrobial that does not disrupt the microbiome the way antibiotics do. Breast milk relevance: human breast milk contains 18–20% lauric acid — among all human tissues. This concentration provides passive antimicrobial immunity to newborns whose immune systems are not yet functional. Concentration in coconut oil: virgin coconut oil provides 47% lauric acid — the richest plant-based source of lauric acid on earth.
— Why It Matters
Kerala's centuries-old practice of using coconut oil as the primary cooking fat and for Abhyanga (oil massage, including for infants) has a biochemical basis. The coconut oil → monolaurin pathway provides topical and internal antimicrobial protection that is consistent with the traditional uses documented in Ayurvedic medicine. This is not mythology — it is a validated mechanism.
— Related Terms
— See in Field Guide
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