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MOVEFREE
MCT Oil – Fast Energy, Ketones, and Cognitive Focus
MCTs (Medium Chain Triglycerides) are fatty acids with 6–12 carbon atoms that are processed by the body entirely differently from long-chain fats. MCT oil is directly converted into ketones in the liver, which serve as a rapid energy source for the brain and muscles.
What are MCTs? The Classes of Fatty Acids
| Chain Length | Carbons | Name | Main Source |
|---|---|---|---|
| Short-chain (SCT) | C2–C4 | Acetic acid, Butyric acid | Fermentation, Milk |
| Medium-chain (MCT) | C6–C12 | Caproic acid (C6), Caprylic acid (C8), Capric acid (C10), Lauric acid (C12) | Coconut oil, Palm kernel oil |
| Long-chain (LCT) | C14+ | Palmitic acid, Stearic acid, Oleic acid, etc. | Most animal/plant oils |
Why MCTs are Different: The Metabolic Pathway
LCTs require carnitine as a shuttle into the mitochondria and pass through the lymphatic system. MCTs (especially C8/C10):
- Are absorbed directly into the portal blood in the intestine (no carnitine needed)
- Go directly to the liver (first-pass metabolism)
- Are preferentially converted into ketones (β-hydroxybutyrate, acetoacetate)
- Ketones serve as fast, efficient energy for the brain, heart, and muscles
C8 vs. C10 vs. C12 – Which MCT Fraction is Best?
| Fatty Acid | Ketone Efficiency | GI Tolerance | Proportion in Coconut Oil |
|---|---|---|---|
| C8 (Caprylic acid) | Very high (fastest ketone production) | Moderate at high doses | ~6–7 % |
| C10 (Capric acid) | High | Better than C8 | ~6 % |
| C12 (Lauric acid) | Low (behaves more like LCT) | Good | ~45–50 % |
Premium MCT oil primarily contains C8 and C10. Coconut oil is mainly C12 (Lauric acid) – which produces hardly any ketones and is not an MCT oil in the sense of a supplement.
Proven Effects
| Effect | Evidence | Note |
|---|---|---|
| Fast energy/ketones | Very well-documented | Measurable ketone increase after 30 min. |
| Cognition/Focus | Good (especially in early-stage Alzheimer's) | Ketones as an alternative substrate for the brain |
| Weight management | Moderate | Increased satiety, slightly higher basal metabolic rate |
| Athletic endurance (low-carb) | Moderate | Beneficial with keto-adapted diet |
| Alzheimer's / cognitive decline | Good (for cognitive endpoints) | Largest effect in APOE4-negative patients |
Intake Recommendations
- Beginners: 1 tsp/day (5 ml), gradually increase to 1–3 tbsp/day (GI adaptation needed)
- Pre-Workout (keto-athletes): 15–30 ml MCT oil, 30 min. before training
- Cognition/Focus: 15–30 ml in the morning, on an empty stomach or in Bulletproof Coffee
- GI Protection: Increase slowly – too much at once causes diarrhea and GI cramps
Frequently Asked Questions (FAQ)
Is MCT oil suitable for non-keto diets?
Yes – MCT oil also produces ketones with normal carbohydrate intake (albeit less). The cognitive and energy effects occur even without a keto diet, but are stronger with a low carbohydrate status.
Can MCT oil be taken during intermittent fasting?
Physiologically, MCT oil breaks a fast (calories). For ketosis itself, it does not interfere much. Opinions are divided – depending on the fasting protocol and goal.
