C8 is caprylic acid, the shortest medium-chain triglyceride. It is absorbed quickly and converted to ketones in the liver, which is why Bulletproof markets it for brain energy.

How do I use a packet?

Tear one 15 ml packet into hot coffee, tea, water or a shake. Start with half a packet if you are new to MCT oil, since a full dose can upset the stomach.

Is this the same as the Brain Octane bottle?

Yes, it is the same C8 oil in single-serve packets. The bottle is cheaper per ounce; the packets are for portability and portion control.

Does it break a fast?

MCT oil supplies calories, about 115 per 15 ml packet, so it is not calorie-free. Many keto dieters still use it during fasting, but strict fasters may avoid it.

How should I store the packets?

Keep them at room temperature, away from direct sunlight. The packets are sealed for freshness, but check the printed best-by date before long trips.

Is it gluten-free and vegan?

Brain Octane is plant-derived from coconut and palm kernel oil and is labeled gluten-free and vegan. Check the packet for the current certification marks.