MCT Oil
Medium-chain triglycerides — fats that bypass normal digestion and go straight to the liver, where they become ketones for quick brain energy.
Strong for raising blood ketones, supporting weight loss in calorie-controlled diets, and as alternative brain fuel in epilepsy and Alzheimer's research. Modest for endurance performance, cognitive performance under glucose restriction. Acute effects (ketone rise): hours.
Medium-chain triglycerides are fats with 6–12 carbon chains (versus the 14–24 of most dietary fats). They skip lymphatic absorption, go directly to the liver via the portal vein, and are rapidly converted to ketones — alternative fuel for the brain and muscles, especially useful when glucose is restricted. C8 (caprylic acid) and C10 (capric acid) are the most ketogenic. The famous 'butter coffee' effect comes from MCTs. Most useful for ketogenic dieters, cognitive support during intermittent fasting, and as quick energy that doesn't require digestion. Start small — full doses on a naive gut produce a fast and unpleasant experience.
- Form
- C8-only (caprylic acid) MCT oil — most ketogenic, cleanest. C8/C10 blend — slightly cheaper, still effective. Coconut oil contains ~50% MCTs but mostly C12 (lauric acid), which acts more like a long-chain fat — less effective per gram. MCT powder for travel / mixing into drinks.
- Dose
- 1–2 teaspoons (5–10 g) initially, building to 1–2 tablespoons (15–30 g) daily as tolerated.
- Timing
- AM in coffee for sustained cognitive energy. Pre-workout. With meals to slow digestion and improve satiety.
- Schedule
- Daily as part of a ketogenic / low-carb diet. Anytime for cognitive use.
- Side effects
- 'Disaster pants' — the classic over-dose effect. Cramps, urgent diarrhea, GI upset. Start small (1 tsp) and titrate up. Most people adapt over 1–2 weeks.
- Interactions
- Generally clean. Coumadin / warfarin — theoretical mild interaction. Some diabetes medications — additive on glucose control.
- Contraindications
- Liver disease (rare — MCTs are processed by the liver). Active gastroparesis. Caution in those with extreme caloric restriction or eating disorders (ketones can suppress hunger).
- Lab markers
- Blood ketones (beta-hydroxybutyrate) for ketogenic tracking. Lipid panel periodically.
- Food sources
- Coconut oil and palm kernel oil contain MCTs naturally (mostly C12, less effective). Whole coconut and full-fat dairy contain small amounts. MCT oil itself is a refined product, not a whole food.
Pairs with
Coffee + grass-fed butter (the original butter-coffee stack). Ketogenic diet (amplifies the ketone effect). Exogenous ketone esters / salts for stronger / faster ketone elevation.
Where to buy
Prices are checked periodically and drift — Amazon’s is the live one. We take no commission on these links.
within Fatty acids