Our buying criteria for coconut oil are six short lines. This is the working behind them — what the words on the label actually mean, what the market refuses to measure, and why one of coconut oil's most famous claims came off our page. You do not need any of it to buy a jar. It is here because we would rather show it than ask you to take our word.
Whether anything on the front of the jar is checkable. Mostly it is not. Coconut oil is the clearest case on this site of a product where the words are unregulated and the numbers are unpublished, so what is left to judge is the type of oil and the honesty of the seller.
On an olive oil bottle, virgin and extra virgin are defined grades with figures behind them. On a coconut oil jar they are not. There is no US definition of either term for coconut oil, and no test a producer has to pass before printing them. The two words are used interchangeably and there is no substantial difference between them. This does not make the words useless — virgin oil really is pressed from fresh coconut without heat or refining, which is why it smells of coconut, and refined oil really is deodorized, which is why it smells of nothing. It means the words describe a process the seller says it used, not a standard anyone checked.
Rancidity is the real quality question for any oil, and it is measurable three ways: free fatty acid, peroxide value, and p-anisidine value. A refined oil typically sits below 1 milliequivalent per kilogram on peroxide value, and above 3 it is considered oxidized. There is a voluntary industry specification for virgin coconut oil that sets moisture at 0.15 percent or less, free fatty acid at 0.2 percent or less, and peroxide value at 3 or less. We checked eleven coconut oil brands sold in the US in August 2026. Every one of them states whether it is virgin or refined. NOT ONE publishes a peroxide value, a free fatty acid figure, a moisture percentage, or a lauric acid percentage, and not one has a certificate you can open. Eleven out of eleven. This is the emptiest category we have surveyed.
Coconut oil is sold as a medium-chain fat that the body burns quickly rather than stores. About half of it — roughly 45 to 53 percent — is lauric acid, and lauric acid is where the argument is. True medium-chain fats are absorbed straight to the liver. Lauric acid sits on the boundary: it can be handled either way depending on digestion and on what else is eaten with it, which is why it is classified as either a long-chain or a medium-chain fat depending on who is writing. What is not disputed is the arithmetic. The fats that are unambiguously medium-chain, caprylic and capric, make up about 13 percent of coconut oil. So a jar marketed on its medium-chain content is about one-eighth of what the marketing means, with the argument covering another half.
Bottled MCT oil is roughly 50 to 80 percent caprylic acid and 20 to 50 percent capric acid, and typically contains no lauric acid at all. Fractionated coconut oil is the same idea from the other direction: the lauric acid is taken out, which is why it stays liquid — lauric acid is the part that makes coconut oil solid on a cold shelf. If a page tells you coconut oil and MCT oil do the same thing, it has not looked at what is in either bottle.
Work published in 2003 compared coconut, mineral and sunflower oil on hair protein loss. Coconut oil was the only one of the three to reduce protein loss, and it did so on both undamaged and damaged hair, used before washing and after. Mineral oil and sunflower oil showed no protective effect at all. The reason given is structural: coconut oil is a lauric acid triglyceride with low molecular weight and a straight-chain shape, so it has a high affinity for hair proteins and gets inside the hair shaft. Mineral oil has no protein affinity, and sunflower oil is too bulky to enter. This is the one coconut oil claim where the mechanism and the result agree, and it is why our page says dry hair without hedging.
Coconut oil scores 4 out of 5 on the comedogenic scale, which is high. Read the method before you read the score. That scale comes from a 1989 assay in which the substance was applied daily to the inner surface of a rabbit's ear for two weeks, chosen because a rabbit ear blocks in two weeks where human skin might take six months. Rabbit skin is more sensitive than human skin, swelling around a follicle can come from irritation rather than blockage, and the test conditions were never standardized. So the 4 is a screening result from a rough old method, not a prediction about your face. What we would say plainly: coconut oil is one of the more pore-blocking oils in common use, the evidence for that is weaker than the number makes it look, and a face that breaks out is the wrong place to find out. On dry skin the picture is better — a four-week comparison in 52 adults found virgin coconut oil improved severity more than virgin olive oil did.
Coconut oil is about 86 percent saturated fat. Butter is about 64 percent and olive oil about 14. A pooled analysis of 17 trials in 730 people found that, set against non-tropical vegetable oils, coconut oil raised LDL cholesterol — the kind that can build up in arteries — by 10.47 milligrams per deciliter. It raised HDL by 4.00. Here is the part almost nobody says: those are blood markers, not outcomes. No study has ever looked at whether eating coconut oil changes how many people have heart attacks. So the honest position is neither that coconut oil is a health food nor that it is dangerous. It is that it moves a marker in the wrong direction and nobody has measured what happens next. Our page used to name it as a stable cooking fat and then warn readers not to rely on it as their only one. That is a page arguing with itself in front of the reader, so the benefit came off and the working came here.
Because the buying section is how we chose, not homework for you. The page says to check whether you are holding virgin, refined or fractionated oil, to want a short ingredient list, to prefer virgin for skin and hair and refined for a neutral flavor, and to want it sealed and tested. This is what we do when we apply that. It is also where the things we cut from the page go, rather than disappearing.
We have no product of our own and take no payment for a place on a list. Where a figure below is not ours, the source is named so you can check it yourself.