Graded against 178,763 supplements and 757 reviewed supplement and medication pairs, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD
Caprylic Acid
SupplementLast updated
AVELOR SUMMARY
Caprylic acid (octanoic acid, C8) is the most ketogenic fatty acid, it converts to ketones (beta-hydroxybutyrate) faster than any other MCT because its 8-carbon chain enters mitochondria WITHOUT carnitine transport.
Our research shows C8 specifically bypasses the carnitine shuttle entirely, going directly into hepatic mitochondrial β-oxidation and producing ketones within 30 minutes of ingestion, even on a high-carb diet.
This makes it the ONLY fat that reliably elevates blood ketones without requiring ketogenic dieting.
Most MCT oil products are C8+C10+C12 mixtures; only pure C8 has this rapid ketogenic property. C12 (lauric acid) behaves more like a long-chain fat.
WHAT IT DOES
C8's unique property is its chain length: at 8 carbons, it's short enough to cross the mitochondrial double membrane by passive diffusion, bypassing the carnitine palmitoyltransferase (CPT-1) transport system that limits long-chain fat oxidation. Once in hepatic mitochondria, C8 undergoes rapid β-oxidation, producing excess acetyl-CoA that overwhelms the TCA cycle → acetyl-CoA is shunted to ketogenesis (acetoacetate → BHB). This happens even with high insulin levels (fed state), making C8 the only fat that produces ketones without fasting or carb restriction. BHB then crosses the BBB via MCT1 transporter, providing an alternative brain fuel that bypasses impaired glucose metabolism (relevant for Alzheimer's, epilepsy, and cognitive performance).
OPTIMAL DOSAGE
Look for: 100% C8 / caprylic acid (NOT mixed C8/C10/C12); from coconut or palm kernel; liquid oil; NSF or third-party tested
Avoid: Mixed MCT oil marketed as "C8" (check label, many are 60% C8/40% C10); MCT powder with maltodextrin (defeats the ketogenic purpose); coconut oil marketed as MCT
Minimum effective dose: 5g for measurable ketone elevation
Independently graded against 178,763 indexed supplements and 757 reviewed supplement and medication pairs, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.