MCT power at its purest: Sourced from organic coconuts, this ultimate keto fuel powers your day and powers a healthier planet. C8 stands for Caprylic Acid. Capyrlic acid is one of the main fatty acids that medium chain triglycerides are comprised of. Our C8 MCT oil is a Coconut Medium Chain Triglycerides oil with nearly 100% of the MCT content coming from C8.