MCT oil comes primarily from coconut oil and palm kernel oil, the two richest natural sources of medium-chain triglycerides. The oil you buy in a bottle isn’t simply pressed from coconuts, though. It’s a concentrated product created by extracting and isolating specific fatty acids from these tropical oils, then recombining them into a purified form.
The Two Main Source Oils
Coconut oil is the most common starting material for commercial MCT oil. It naturally contains about 42% lauric acid (a 12-carbon fat), 7% caprylic acid (8-carbon), and 5% capric acid (10-carbon). That means only a fraction of coconut oil qualifies as the type of medium-chain fat found in MCT oil supplements, which is why manufacturers have to refine and concentrate it.
Palm kernel oil is the other major source. It comes from the seed inside the palm fruit (not from the fruit itself, which produces regular palm oil) and has a similar fatty acid profile. Some MCT oils blend fatty acids from both coconut and palm kernel sources, while many brands market themselves as “coconut-derived” to appeal to consumers who prefer that origin. Dairy fat also contains small amounts of medium-chain triglycerides, but the concentrations are far too low for commercial extraction.
What “Medium Chain” Actually Means
Fats are built from chains of carbon atoms, and the length of that chain determines how your body processes them. Medium-chain triglycerides have chains of 6 to 12 carbons. The four types are caproic acid (6 carbons), caprylic acid (8 carbons), capric acid (10 carbons), and lauric acid (12 carbons).
Most commercial MCT oil contains only caprylic and capric acid. These two are favored because they’re absorbed quickly and sent straight to the liver for energy, rather than traveling through the slower digestive route that longer fats take. A typical product uses a ratio of roughly 75% caprylic acid to 25% capric acid, though some formulations shift that balance. You’ll sometimes see “C8 oil” sold on its own as a premium product, since caprylic acid is considered the most efficiently absorbed of the group.
Lauric acid sits in a gray area. It’s technically classified as a medium-chain fatty acid, but it behaves more like a long-chain fat during digestion. That’s why most MCT oil manufacturers remove it during processing, and why straight coconut oil (which is nearly half lauric acid) isn’t the same thing as MCT oil.
How MCT Oil Is Made
Turning coconut or palm kernel oil into MCT oil requires several processing steps. The goal is to separate the shorter-chain fatty acids from the longer ones that make up most of the original oil.
First, the source oil is broken down. The triglyceride molecules are split apart, freeing individual fatty acids from their glycerol backbone. This can be done through hydrolysis (using steam and pressure) or through a process called ethanolysis, which converts the fats into a form that’s easier to sort by chain length.
Next comes fractionation, the step that actually isolates the medium-chain fatty acids. The most common industrial method is short-path distillation, which works by heating the fatty acid mixture under a near-vacuum. Because shorter-chain fatty acids are more volatile, they evaporate at lower temperatures and can be captured separately on a cooled surface, while longer-chain fats stay behind as residue. This approach operates under mild conditions and avoids the harsh chemical treatments used in older extraction methods.
Finally, the isolated medium-chain fatty acids are recombined with glycerol through an esterification reaction, rebuilding them into triglyceride molecules. This step produces the clear, tasteless, liquid oil sold in bottles. Enzyme-based catalysts can drive this reaction with high purity and fewer byproducts than chemical methods.
Coconut vs. Palm Kernel Sourcing
The finished MCT oil is chemically identical regardless of whether it started as coconut or palm kernel oil. The fatty acids are the same molecules either way. The difference is environmental and ethical rather than nutritional.
Palm oil production has faced significant scrutiny over deforestation and habitat destruction, particularly in Southeast Asia. Certified sustainable palm kernel oil exists (verified through programs like the RSPO), but many consumers remain wary. Coconut farming is generally perceived as more environmentally friendly, especially when sourced from smallholder farms in countries like the Philippines, where it supports rural communities. If sourcing matters to you, check the label for “coconut-derived” or look for sustainability certifications.
Why MCT Oil Isn’t the Same as Coconut Oil
This is the most common point of confusion. Coconut oil contains medium-chain triglycerides, but it’s far from a concentrated source. Only about 12 to 15% of coconut oil is the caprylic and capric acid that makes up MCT oil. The rest is mostly lauric acid and longer-chain fats that your body handles differently. Taking a tablespoon of coconut oil gives you a small dose of true MCTs along with a much larger dose of other saturated fats. MCT oil, by contrast, is essentially 100% caprylic and capric acid, delivering a concentrated dose without the other fatty acids coming along for the ride.