Graded against 178,763 supplements and 757 reviewed supplement and medication pairs, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD
MCT Oil
SupplementLast updated
AVELOR SUMMARY
MCT oil contains C6-C12 fatty acids (primarily C8 caprylic acid and C10 capric acid) that bypass normal fat digestion, they're absorbed directly into the portal vein and transported to the liver, where they're rapidly converted to ketones.
This makes MCTs the fastest dietary source of ketone body production.
Our research shows moderate evidence for weight management (MCTs increase energy expenditure by 5% and fat oxidation by 12% vs long-chain fats) and cognitive support in Alzheimer's (ketones bypass impaired glucose metabolism in AD brain).
The ketogenic diet community has made MCT oil popular, but the evidence for cognitive benefits in HEALTHY adults is weak.
WHAT IT DOES
MCTs (C6-C12) are water-soluble enough to be absorbed directly from the intestine into the portal vein WITHOUT requiring bile acid emulsification, pancreatic lipase, or chylomicron formation. They travel directly to the liver, where they undergo rapid β-oxidation → acetyl-CoA → ketone bodies (β-hydroxybutyrate, acetoacetate). Ketones cross the blood-brain barrier via MCT1 transporter and serve as alternative fuel for neurons. In Alzheimer's, brain glucose transporters (GLUT1, GLUT3) are impaired by 25-40%, but ketone transporters remain functional, MCT-derived ketones bypass the glucose bottleneck. For weight management: MCTs have 10% fewer calories per gram than long-chain fats (8.3 vs 9.0 kcal/g) and increase thermogenesis via uncoupling protein activation.
OPTIMAL DOSAGE
Look for: C8 caprylic acid dominant (≥70%); or C8+C10 blend; "MCT oil" from coconut or palm kernel source; liquid form for dosing flexibility
Avoid: Coconut oil labeled as "MCT" (only 15% MCTs); C12 lauric acid-dominant products (not true MCTs metabolically); MCT powder with maltodextrin as primary ingredient (defeats the purpose)
Minimum effective dose: 15mL/day (1 tablespoon) for measurable ketone production
Third-party tested brands: Bulletproof (Brain Octane, pure C8), NOW Foods, Sports Research, Nutiva
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.