fatty acid · for afternoon energy crash
MCT Oil
A fat your body turns into quick fuel without spiking insulin.
Say that in clinical terms
Provides quick energy from C8/C10 medium-chain fatty acids, no insulin spike, sustains blood sugar stability.
How strong is the research?
2 papers read, 1 supporting.
Who was studied: The human trials are in metabolic syndrome, obesity or athletes.
No human trial was found that measures afternoon energy crash, postprandial energy dip, or subjective fatigue in a daily-life context as the primary endpoint for MCT oil. Trials of MCT oil exist for: cognitive performance during exercise (physbeh 2023, DOI 10.1016/j.physbeh.2023.114284, which tested a C8:C10 30:70 blend — not a standard commercial MCT oil ratio — and measured working memory and processing speed during/after exercise, not afternoon energy levels), weight loss, metabolic rate, endurance exercise performance (with null results per systematic review PMID 36096496), and blood lipids. The ketonemia paper (DOI 10.1016/j.nut.2012.09.009) measured blood ketone elevation, not subjecti
How much to take
daily
10–20 g
Take midday for sustained afternoon energy. Does not spike insulin.
Before you take it
- No NIH ODS Tolerable Upper Intake Level established; MCT oil is a food fat classified as GRAS by the FDA, not a dietary supplement with a formal UL from the Institute of Medicine or NIH ODS.
- GI adverse effects (nausea, cramping, diarrhea) are dose-dependent; incidence increases substantially at doses above 20-30 g; risk is reduced by gradual dose escalation and consumption with food.
- Calorically dense at approximately 8 kcal/g; habitual supplementation adds meaningful caloric load that should be factored into total energy balance.
- Derived from coconut or palm kernel oil; individuals with coconut hypersensitivity should consult a clinician, although commercially refined MCT oil typically contains negligible allergenic protein.
- A 2021 systematic review and meta-analysis (J Nutr 2021;151:2949-2956) found MCT oil raises total cholesterol and LDL-cholesterol compared to unsaturated fat comparators, and modestly increases triglycerides (~0.14 mmol/L); clinical significance depends on baseline lipid status and dietary context.
- MCTs are metabolized primarily in the liver via beta-oxidation and ketogenesis; use with caution in patients with hepatic disease or impaired liver function.
- No pharmacokinetic drug-drug interactions are established in the standard sense; however, MCTs may enhance the absorption of co-administered fat-soluble compounds (vitamins, medications).
What we make of it
Plausible, but nobody has tested it in healthy adults.
The detail
The idea that MCTs raise ketones and smooth out the insulin response is biologically reasonable. No large independent trial has tested an afternoon energy crash as an outcome in healthy adults.