Skip to main content

Fatty Acid

Mct

Also known as: Medium-chain triglycerides, MCT, Caprylic acid/Capric acid oil, C8/C10 oil

B
Evidence

MCT oil is a dietary fat composed of medium-chain triglycerides (6-12 carbon chains) that are rapidly absorbed and metabolized, potentially supporting ketone production and energy availability. Research supports its use for cognitive function, weight management support, and athletic performance, though effects are modest and individual responses vary.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

Find the best Mct supplements — free
See Mct products scored on dose & form, then track your intake in the app.
Open app →

Primary uses

  • rapid energy source
  • ketogenic diet support
  • cognitive function
  • athletic performance
  • Cognitive function and mental clarity
  • Energy and endurance support
  • Weight management adjunct
  • Rapid energy availability
  • Quick energy source
  • Potential cognitive function support
  • Fat loss support (as part of caloric deficit)

How it works

  • Rapid hepatic oxidation and ketone body production
  • Quick absorption and metabolism compared to long-chain fats
  • Potential enhancement of mitochondrial ATP production
  • May increase fat oxidation and reduce appetite hormones

Dosage

Typical range
5-15 grams (5-15 mL) daily
Timing
Morning or pre-workout for energy; with meals for tolerance
With food
Recommended, especially for digestive tolerance; can be taken alone if well-tolerated
Duration
Can be used continuously as a dietary fat source; effects on cognition and energy typically appear within 1-2 weeks
Special populations
Start with 5 grams or less to assess tolerance; those with fat malabsorption or GI sensitivity should introduce gradually

Forms

  • powder· 70/100
  • Liquid oil· 70/100
  • Softgels· 70/100
  • Powder (emulsified)· 70/100
  • Caprylic acid (C8)· 70/100
  • Capric acid (C10)· 70/100
  • Blended C8/C10· 70/100
  • Powder (70% MCT oil with carrier)· 70/100

Safety

Common side effects

  • Gastrointestinal upset (nausea, diarrhea, cramping)
  • Headache
  • Appetite changes
  • Transient fatigue during adaptation

Contraindications

  • Gallbladder disease or post-cholecystectomy (use cautiously)
  • Severe fat malabsorption disorders
  • Acute pancreatitis

Evidence notes

Good evidence from multiple RCTs showing benefits for cognitive performance, energy availability, and modest weight management effects. More established than many novel nootropics but effects are typically modest and subject-dependent.

Grade B: Some human trials support key claims; further confirmation needed.

Related in Fatty Acid

Check a full stack

Formulate's free interaction checker lets you paste in any combination of supplements and medications at once — every pairing flags severity, timing, and cited evidence.

Open the checker

Where does Mct fit in your stack?

Answer two questions and get a stack graded on research — every ingredient scored on the evidence behind it, not the marketing.

Build my stack

2 questions · free · no account needed to start

Also on iPhone — get the free app

📬 Get new guides in your inbox

Evidence-based supplement guides, no spam

We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.

Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.