The Ketogenic Effect of Medium-Chain Triacylglycerides.
Level 5 - mechanism / opinion, no new human data
Narrative review of human studies without systematic review methodology
PubMed 34888335 · doi:10.3389/fnut.2021.747284
What was done
Narrative review of published literature investigating the ketogenic effect of medium-chain triacylglycerides (MCTs) in healthy adults. The review assessed factors influencing ketone yield and gastrointestinal tolerance, including MCT composition (caprylic acid [C8] versus capric acid [C10]), dose titration, fasting duration, meal composition, emulsification, and caffeine co-ingestion.
What was found
The abstract reports no numerical effect sizes or blood ketone concentrations. It provides qualitative recommendations: initiate dosing at 5 g of C8 or a C8/C10 combination and titrate up to 15-20 g of C8; consume MCTs after an overnight fast, either alone or with a low-carbohydrate meal; consider caffeine co-ingestion to slightly enhance ketone response; and use emulsified formulations to potentially increase ketogenesis and reduce gastrointestinal discomfort and diarrhea.
Why it matters
Provides practical administration strategies to optimize ketone generation from MCT supplements while mitigating dose-limiting gastrointestinal side effects.
Limits
The abstract provides no quantitative data, effect sizes, or study counts, and does not report systematic review methodology. Findings from healthy adult cohorts may not fully generalize to clinical populations with neurodegenerative conditions.
Cited by
- supports Up to 40% to 50% of people experience gastrointestinal tolerability issues when consuming liquid MCT doses large enough to induce sustainable ketosis.