Fettsäuren

Why C8 MCT (caprylic acid) is three times more ketogenic than other MCTs

By Tobias Stumpfl

Ketogene Vanillesauce

Not all MCT oils have the same ketogenic effect. A human study investigated how different medium-chain triglycerides (MCTs) affect ketone body levels in the blood. The focus was on β-hydroxybutyrate (BHB) – the most researched ketone body and the one associated with many of the benefits of fasting and ketosis.


The researchers analyzed how plasma BHB levels change over several hours after the ingestion of different MCT fatty acids. Caprylic acid (C8) , capric acid (C10) , and lauric acid (C12) were compared.


The result was clear:
Caprylic acid (C8) increased BHB levels significantly more than the other MCTs.
Under the same metabolic conditions, C8 was:

  • approximately 3 times as ketogenic as C10

  • and about 6 times more ketogenic than C12



The reason for this lies in its metabolism: C8 is absorbed particularly quickly from the intestine, transported directly to the liver, and efficiently converted there into β-hydroxybutyrate . As a result, ketone levels in the blood rise faster and more significantly than with other MCT fatty acids.


These results clearly show that the quality and composition of MCT oil is crucial when the goal is to specifically support the body's own ketone body production – for example, to mimic the effects of fasting in everyday life.

CONCLUSION

  • β-Hydroxybutyrate (BHB) is the most important and best-studied ketone body

  • C8 (caprylic acid) is significantly more effective at increasing ketones than C10 or C12.

  • Not every MCT oil is automatically "highly ketogenic"

  • Pure C8 is particularly well suited to promoting fasting-like metabolic states.

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