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Fatty Acid

C8 MCT Oil Powder

Also known as: Caprylic Acid MCT, C8 caprylic acid powder, pure C8 MCT

C
Evidence

C8 MCT oil powder is a specialized form containing primarily caprylic acid (8-carbon medium-chain triglyceride), the most rapidly metabolized MCT chain length. It is marketed as the most efficient MCT variant for ketone production and quick energy.

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

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Primary uses

  • rapid ketone body production
  • quick energy in fasting/ketogenic states
  • cognitive performance
  • athletic recovery

How it works

  • fastest hepatic oxidation among MCTs due to C8 chain length
  • maximal ketone body production in low-carb states
  • minimal pathway intermediate storage

Dosage

Typical range
5-15g (1-3 teaspoons) daily
Timing
morning on empty stomach or pre-workout for maximal ketone production; can divide dose
With food
best taken fasting or with minimal carbohydrates for ketone effect; fat with meals reduces relative advantage
Duration
continuous use is safe; GI tolerance typically improves with consistent use
Special populations
Start with 5g due to potency; those new to MCTs prone to GI distress should begin lower; individuals with liver disease, uncontrolled diabetes, or metabolic disorders should consult provider

Forms

  • powder· 70/100

Safety

Common side effects

  • gastrointestinal distress
  • loose stools
  • diarrhea
  • nausea at higher doses

Contraindications

  • severe liver disease
  • uncontrolled diabetes
  • medium-chain acyl-CoA dehydrogenase (MCAD) deficiency

Evidence notes

While MCTs generally show good evidence (Grade B), pure C8 products have more limited direct comparative research versus mixed-MCT oils. Some evidence suggests C8 may be more ketogenic than C10/C12, but clinical significance is modest. Most studies use mixed MCT blends.

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

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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.